Suddenly Sensitive and Overly Emotional

Annie
I'm in the TWW and last night had the most unbelievable emotional reaction to my husband wanting a particular snack. I ended up crying and felt myself losing control. I haven't had that kind of feeling in a long time, really, so I'm not sure if I'm PMSing OR if I'm pregnant! 
Does anyone else have severe and random and unexpected or inconsistent high emotions?!