Suffering

In 4 hours time, i'll be sitting in the exam hall for my genetic final test. I am so tired....this is the first time ever i totally surrender myself for this. I feel so stupid and useless. I just cant remember what i've study and i cant understand what i study. I seriously dont want to let my parents down, i wanted them to feel proud for me. But i just cant do that!!! I'm so useless. I always letting them down. I'm so stupid. What i can do now is pray hard so that those things which i had studied and remembered well will be usefull in the paper later. I'm so tired of this final exam thingy.