I have a hard time gathering my thoughts.. I feel like they're all over the place and it's like I don't know what to do first. I try to make lists of my thoughts to make it easier for me, but then I feel like I haven't written everything down and it really frustrates me. I'm also very impatient, I cannot stay in one position or in one place very long, I'll start to get very agitated. I have a lot of trouble concentrating also. are these signs of ADHD?