Sorry, I dont understand the problem. You fainted, you didnt piss yourself and leave a massive puddle on the seat. This isnt embarassing whatsoever, and theres absolutely no reason why you shouldnt go back to college. I dont know what kind of people go to your college, but nobody at mine would care/take the piss out of someone for fainting. Infact its happened to some girl I know 2 times in the middle of assembly. Nobody cares.