Help?

Hi I'm looking for some help figuring out what is going on with me recently.
I've been having these alarmingly agressive thoughts coming into my head, really drastic mood swings, found myself sort of having to do things in 3's otherwise I think something will go wrong, and now I've been seeing things that I'm not totally sure were there. I was alone for these weird occurences but they were all so weird and they happened in a close time proximity to eachother and it just seemed... I don't know, off I guess.
Can anyone serious help me figure out what's wrong??