I have two special needs sons and I've done all kinds of therapy and what not. So kind of randomly:
Nutritional supplements actually have a better track record than drugs for dealing with things like ADHD. If you can pinpoint the things that you need for your brain, you can see real improvement over time.
B vitamins, high quality salt, the right fats and certain minerals, like magnesium and calcium, are likely candidates. Start a journal. Try one and only one new thing at a time to see what it does. Don't buy multi vitamins. Get individual supplements and make sure they are bioavailable.
Mold problems at home, work or anyplace you spend a lot of time can have significant negative impact in mental function. Try to root out moisture issues and mold problems.
Start a private journal and deconstruct what people say to you, how you feel about it and why you feel that way. Most people aren't terribly nice. The veneer of civilized behavior tends to be pretty thin. It may be more them than you. You may find your reactions aren't as irrational as you think they are.
During my divorce, under circumstances where I didn't really care how things played out and a lot of men were chatting me up, I point blank asked men what they thought was attractive about me. This was incredibly eye opening because every one of them had a different answer. So my ideas about what made me attractive -- that it was X or Y specific thing -- were completely busted and it was a fantastic experience. People are attracted for reasons specific to them. It isn't really a case of "I have X trait and that is my main attraction."
So if you ever have an opportunity to participate in a workshop or similar where you can get feedback from a variety of people, you might be surprised what you learn about how the world sees you. It can be a wonderful antidote to the thoughts about yourself that dominate your self image.
Similarly, I did a series of self portraits in therapy and that was eye opening. Most people don't really have a clear idea of what they look like. Their idea of themselves is often something of a caricature that exaggerates specific traits and underplays others.
Best.