Hi, I m Lander, I m 17 years old and in the last year of high school, I m from Brazil. The problem is I used to be really good at school, I played chess really well and could easy concentrate in a book no matter how loud people were talking next to me. Unfortunately this has changed, I m not bad at school but I don t have the best grades anymore, can t win a chess match against my computer and reading is a problem as I can t pay close atention what I m reading to. I also don t sleep really well at night but can t keep myself awake in the afternoon. Can all these sintoms be a health problem?