what happen???

argh..
what happen to me
this few day i'm feel tired
don know why..
i don't know the reason too
anybody can tell me?
i'm feel suffer too
maybe exam is too stress for me?
how can i solve this problem..
next week i have to start exam..
but..
i haven't finish my revision
argh
too many subject have to go..
but i'm stil dreaming
=(
anybody can tell me how should i solve this problem?