Sorry you're going through this experience hangingon. This often happens to me where I will have a decent day or even a good day and then all of a sudden *bam* overwhelming sadness or depression hits me. I have stopped trying to figure out why and have instead focused on how to cope with that. Sometimes just going out and being around people helps or sometimes it's going home and being by myself that helps. I suppose over time it would help to know why but it's not helpful to have the urgency of finding out because that may not happen for a long time, and that's okay. Everything is a process as painful as that may sound. Good luck finding some way to cope with these feelings. I know it can be so intense. Keep safe!