Emotional Outburst

I've gone from nice to bitch in 1.3 seconds. Not sure what is going on but I just feel like I need to just go home, crawl under the covers and not come out until I can be nice - and of course have a good cry. Over what, I'm not really sure.

PMS?! I know since my hyster - I haven't been like this, not once. But there were times before it that I was like this. Fine one minute - crying the next.