Suggest Medication For Lack Of Concentration

I think i might have add. I have so much trouble focusing in school and homework. My teachers and my parents dont relize this thought because i am not hyper, just cant focus. From Jr. High to Jr. Year all i can remember is that i havent really been trying in school. I do the bear minimum just to get by. Also the longest i have EVER studied for something was 1 hour for a history final....i cant stay focused any longer. For my homework now, i cant concentrate long enough to do it after school, so im always rushing during school to finish the homework for the next class. So when i told my mom about it and that i might have add, she flipped out....she got so mad that i brought that up and she just said NO ....now i dont know what to do.....this is my jr year and college is right around the corner. If i cant focus in school and concentrate on my homework soon, im going to be in really bad shape for future years