I suffer the same as you, but at a younger age. I have also been wondering if I suffer from ADHD too. Even at university I really struggled to sit there and do

I suffer the same as you, but at a younger age. I have also been wondering if I suffer from ADHD too. Even at university I really struggled to sit there and do one thing for an extended period. I stopped going to lectures because I couldn't handle sitting in the lecture theater for an hour, I could never do homework either. The only work that I've ever really managed to focus on and stick at for hours is physical work, like construction work or hospitality. Like others have suggested, exercise does seem to mitigate my problem somewhat. I've found that going to the gym at lunch really helps. Don't just go solo to the gym though, or you'll just procrastinate at the gym, you need to join a group class.