I am 4 days late for my period. I ve been having pms-like symptoms for the past week and a half to the point where I run to the bathroom thinking I ve started my period, but nothing. I have sore breasts, stomach cramping, backaches, more tired than usual, mood swings and a decrease in appetite . I am sexually active. I guess what I want to know is if I should take a test or wait a few more days? My last period was December 3, 2012 and lasted the usual 6 days.