i got my marks

Today i got my marks for the Physics test i did 2 days ago. I am very disappointed as my marks was not as much as i expected it to be. I could have done better. I did a lot of careless mistakes. I really don't like it when i get bad grades just because of my silly mistakes. Arghh.. i am damn tension right now. I can't understand how can i be such a fool doing those careless mistakes. Most of my unit conversion was wrong and just because of that small calculation error i messed up everything else.. Hmm i must be more carefull next time and i will be.