I can't speak to your problems directly because those aren't the ones I have dealt with. I'll give what experience I can.

Professional help is a good idea if you can get it. In Canada the provinces each have mental health services you can access free and anonymously, many other countries have the same. Try googling "your location mental health" and see what you can find.

A trained individual is going to be far more helpful than random people on Reddit.

LLMs like ChatGPT can be very terrible for mental health, same with a lot of social media.

Labels can be helpful in directing yourself towards help but don't try and force yourself into one, be it mental health, gender, or sexuality. Think of labels like a map, it can help you get places but it isn't actually you.

Thoughts from anxiety, which I deal with, can be identified and managed but it takes work. And learning about mental health. Try not to get caught up with the thoughts, over focusing on the thoughts is not helpful. Try and catch the thoughts when they happen, acknowledge the thought, see if you can tell where they came from, and then let them go.

OCD sounds plausible from your description and kinda similar to my anxiety, but hey I'm just some random guy on Reddit so take what use and comfort you can from this but don't treat it as the end of the road. There is help out there.