Can't cope anymore, please help

Hello!

I am a 20 year old male and I have had obsessive thoughts for around two years, usually going from worry to worry and I can usually just let them go and move on, some taking longer than others obviously.

I have worried about being homosexual, harming others, paedophilia (which is what forces me to ask this question now)

When i was dating my ex girlfriend I would sometimes see her little brother who was around 6/7 years old and he would come in her room and I'd sometimes play on his games consoles with him and play games with him etc.

My mind has suddenly latched onto this and distorted it in a way where I believed I had dry humped him, then I believe I touched him, and now, the worst of all, I believe oral sex occurred.

Although I don't remember this, although I have literally no recollection of it at all, it stays in my mind, tormenting me, making me feel sick, guilty and all in between. I can't seem to shake it off and I just keep thinking "what if it did happen", what if I just don't remember it but it did happen, the police arresting me, spending time in prison, having to tell my family and current girlfriend abou it, I feel trapped and I am scared.

How can I cope? I do not receive any treatment for my mental health issues

We can't diagnose but I highly recommend you see a psychiatrist and a therapist. I think you can receive the treatment and support you need. There are medical and therapeutic treatments...go see a psychiatrist for a full evaluation. They can refer you to a qualified therapist based on your specific concerns, etc. Take care.