Mass Effect 3 Omega freezes at loading screen.

I was halfway through the retake Omega mission when it froze at the losding screen.I have tried everything from restarting the game to restarting the PS3 to no avail. It will not get past the loading screen on any of my save files (autosave, quick save, or restart mission). I don't want to start the whole game from the beginning. Please help.