Not sure what might be causing what you are referring to. I recognise having some compulsions and visiting the same websites over and over again or listening to the same music. I also tend to spend a lot of time looking for shirts,playing games or looking up all about psychology themes, it could be an obsession, it's not to me, but it is to my surroundings, for me it is calming, but sometimes it can lead to forgetting to eat in time or sleep in time and it's not always the best thing when you are exhausted already. I am not diagnosed as OCD however and I cannot tell you if it may be part of it.

I wonder if perhaps it could have something to do with the ADHD you wrote about. Look up ADHD and hyperfocus, it might give some clues.