What preference for routine it this categorized under?

Okay, first of all, i had no idea where else to post this, so if this seems inappropriate i apologize, and if you must, move it somewhere else, but i came here with the intention of asking a particular question and this seemed like a possibly good place to do it at since people are knowledgeable about this stuff here. I don't know if i have a mental illness or not, just in question of one thing. I tried asking this elsewhere but i got no response, only some unrelated ramble about jesus. Anyway...

Every time i read up on personality disorders, the ones that have this preference for routine and dislike of change, it's because change makes them feel nervous or anxious, like change is scary, like they can't predict the outcome or feel in some way or another that this change will bring some kind of doom towards them, or they feel like their life has now lost order and no longer makes sense. But what kind of preference for routine is this where if certain changes are made then you no longer feel at home, even if they are made AT home. But you don't feel anxious due to it, you still know very well what the outcome will be or that things will still be alright and likely go back to normal the next day or whatever. Like, for example, 10 years ago, back in the day we would have this routine where me and my brothers would sit in the living room and they would play video games and my mom would be in the family room on the computer, but one day there was a storm so my brothers could no longer play games and my mom couldn't get on the computer, and she was now in the living room with us, and it made things feel super different, and i was able to mildly tolerate this for a while, but once the night went on, i started to feel sad and eventually cried cause i wanted everything back to normal. It really did make things feel way different. Everyone else was fine, but i couldn't take it. Again, i was not anxious nor scared, i knew the outcome would be we go to bed, wake up, and pretty much figured things would be the same the next day, but while it happened, i felt somehow sad. There were times in my life where this was worse than others, and i have gotten better at it, though. But while it did happen, like sometimes i would be excited to do things, but once we did them differently, i ended up realizing i did not like it and wanted to return back to our normal routine. I will say, they were never rigid or anything nor ritualistic. But i would like to know what this type of preference for routine this is categorized under, rather than asperger syndrome or anxiety disorders, such as OCD or Selective Mutism.

Do what you want with me if this is unrelated and not welcome here, but this seemed like a place i might give a shot at asking something like this at.

I don't know if this is related, but I'm like Sheldon from the big bang theory, in the way that I have my chair. I don't like anyone sitting in my chair. I can't not sit in my chair. It doesn't make me anxious, it just has to happen. I don't have aspergers, I suspect I have schizoid or schizotypal PD. I also only listen to the same 5 or so bands and I can't listen to new music. I also don't like when someone moves anything of mine. It doesn't make me anxious, though.

You have a phobia called Metathesiophobia. When I say phobia, please do not think this is automatically a "bad" thing. You just have this because it is a learned behavior but let me stick to the subject at hand:

What is Metathesiophobia?

Defined as "a persistent, abnormal, and unwarranted fear of changes", each year this surprisingly common phobia causes countless people needless distress.

Known by a number of names - Metathesiophobia and Fear of Change being the most common - the problem often significantly impacts the quality of life.

What is the cause of Metathesiophobia?

Like all fears and phobias, metathesiophobia is created by the unconscious mind as a protective mechanism. At some point in your past, there was likely an event linking changes and emotional trauma. Whilst the original catalyst may have been a real-life scare of some kind, the condition can also be triggered by myriad, benign events like movies, TV, or perhaps seeing someone else experience trauma.

But so long as the negative association is powerful enough, the unconscious mind thinks: "Ahh, I don't like people sitting in my chair. How do I keep myself from getting in this kind of situation again? I know, I'll attach terrible feelings to changes, that way I'll steer clear in future and so be safe." Just like that metathesiophobia is born. Attaching emotions to situations is one of the primary ways that humans learn. Sometimes we just get the wiring wrong.

The actual phobia manifests itself in different ways. Some sufferers experience it almost all the time, others just in response to direct stimuli. Everyone has their own unique formula for when and how to feel bad.

Just as this feeling was learned and you feel sad. You can also learn to feel good by associating good thoughts to when people sit in your chair or change your stuff around. For example, you can give yourself a small reward of somekind when you allow "change" to happen. After a while your emotions will anticipate the reward rather than focus on the situation at hand. Sometime after that, the "reward" will not be needed and the change will no longer bother you.

Does this help you?

What i am experiencing as i said does not relate to anxiety or fear, which you seem to be suggesting, unless you are talking about dorito's post. If so, mine is not the same as his, he just seems to need it to happen, me back in the day, i would actually cry if things were different from how they normally were. I would cry and want everything back to normal, i would constantly speak about wanting things back to normal and if i am away from it too long(which wasn't really too long, but it was long enough for me) i would get upset and cry. This definitely had something to do with a preference for routine, but i can't seem to find anything that matches what i went through. It was not crying due to fear, i was crying cause it made things feel too different for me. I still have it a little bit today, like i sometimes get depressed when i am not doing things at certain times i normally do and am used to doing. I could still see myself crying once in a while, but i can handle it a little better today than i did ten years ago. But yeah, what would this be categorized under?

No one on the forum can diagnose, and I strongly suggest that you speak to a doctor. It sounds as if these feelings are very distressing for you, and if you could get a diagnosis from your doctor, he/she can come up with a treatment plan for you. Please let us know how you get on.