I get my period between 28-31 days normally. This month it was 4 days late (started on july 29th) but came on just like a normal period for me (bad night sweats the 2 nights before, moody, sweet tooth, oily skin, then the day before I get it I always know because I am freezing all day, then horrible cramps). What is weird is that right before I got it and currently I have hard nipples, and the left one is ultra sensative/tingling (I can feel the tingling all the way to my left foot). I was pretty stressed out before I got my period, I know that stress can cause menstruation delay and I do have diagnosed panic disorder and general anxiety. I am also wondering if stress could be causing this weird thing with my nipples?? Or could it be hormonal??