I don't think it has anything to do with you losing your mind. Though it could be part of your psychosis or just generally because you are at a difficult part of your life. I most always remember large portions of the many dreams I have during the night, but occasionally after a really hard sleep or a really bad day previously, I won't seem to remember anything. I wouldn't take this as a sign of anything so bad yet, well other than the fact that you are clearly pretty effected by your recent break and hospitalization.

Can you remember when you started to not remember? (Oh that sounds like a stupid sentence, but you know what I mean.)