Opinions - Help. Best nootropic for my case? (ADHD)

[bobbin]

Hello. I've been thinking about experimenting with nootropics form my ADHD.
What I've heard from other people with ADHD, they have something different from what I have so I'll explain what is that I want to fix and I'd appreciate some suggestions.

Seldom my brain is ready to think. I have to be "in the mood" for thinking and concentrating, when that's the case I can work, but when it's not, and that is almost all the time, I can't.
I also have something called racing brain syndrome. That means that I can't stop thinking, making random dialogs in my head.
That makes impossible to concentrate in one thing and to take my time with something.
Usually when I have the brain power to think and concentrate I have too much, which is counterproductive. I also get hyperactive and have problems staying in my chair and complete the task.
I've seen doctors but they aren't helpful at all.

¿any suggestions?