Hello goalie: I see this is your first post here on PC. So... welcome to PsychCentral!

I hope you find PC to be of benefit.
I'm sorry I can't tell you why you're feeling how you're feeling.

Perhaps other members, here on PC, will have had some similar experiences they can share.
Here are links to 4 articles from PsychCentral's archives, on the subject of ADHD:
ADHD in Adults
Treatment for ADHD in Adults
Living with Attention Deficit Hyperactivity Disorder
Coping Skills For Living With ADHD | Living with ADHD
I wish you well...