When i am a kid  at school i used to be very smart,but yesterday when i met my school friends after 12 years i remember their siblings friend's names too .But from past few years i couldn't remember routes even though i used the route for 1 year ,if someone ask me i couldn't tell them properly, and when i am talking something i forget the point,when i want to learn i had to revise many times even though i can't figure it out ,i used to be too good at math,now i had to take  a calculator even though i feel wrong about the calculation....why .what happened to me,is it curable???