I don't know but do I suffer Traumatic brain injury? I just don't feel everyone else. I feel different. I'm a lot slower, easily irratied.?

I really do feel that I have Traumatic brain injury because my performance is very poor. I did suffer a lot of brain injuries majo blows and head related injuries. Is this why I'm so much slower than people in my school. I DONT FEEL THE SAME. I feel mentally impaired It's such a bad disadvantage.