I'm going thru the exact same thing right now. I thought I was going thru a change because my memory starts to go so I thought it was a hypo-manic stage beginning and now I felt it this week and now today I'm in a deep depression. I went to work for some over-time and stayed just over an hour, I just couldn't do it. I want to just curl up in a ball and sleep but I can't sleep either. I feel so lonely right now, and my husband is at work. I don't even know what triggered it. I am usually going through hypo-mania and every now and then a small depression. I know what to usually look for when it is the hypo-mania. I am just so tired of going thru this over and over and over again, it's never-ending. I hope you feel better.