I certain don't mean to belittle your experience in any way, shape, or form, but if I, myself, tried to recall every experience I had had during my stupidly drunken freshman year, I would probably drive myself crazy.

That said, if this continues to bother you, maybe talking to a therapist might be able to help you sort out what happened--if that continues to be important to you. But try not to beat yourself up. Alcohol causes a lot of problems at every college in American every single year. You are certainly not alone.