Heh, that sucks dude. This sort of thing happened to me while playing FFVII. I was about 25 hours into the game, and the save file became corrupt and would load for me anymore. After that happened, I had to start over, but this time, I made 5 separate save files for the same game, just to ensure the save points would load, and if not, I wouldn't lose too much progress.

This is suggested for any game you play, and I do it for everything now.