I don't care for sound...

I want to curl up and die! I've spent at least 6 hours today trying to get my head around physics paper 4. I just sat a past paper and after marking it I came out with another big fat U! Whats made it worse is I spoke to the guys at Thorpe today who really needed me to work this week but I had to say 'no I have to revise'. Whats the fucking point I might as well have worked, my grade won't change!