I've always found it hard to concentrate since i was a kid, i'm stressed most of the time, angry a lot.it just doesn't feel right.any advice?

Need evaluation: Your profile may suggest ADD or Attention Deficit Disorder. I do not want to make this hasty judgement, nor do I intend to challenge you abilities. With higher IQs one to overcome some of these traits and behavior. Inability to focus, impulsivity and anger are some of the manifestations of ADD HOpe this guides you correctly. There are other causes, beyond my scope without more history, etc.