i am 10 days late for my menstrual , normally it comes on the 12th like clockwork but not this month, i have been having mild cramps near my pelvis and back aches, nausea bloating breast tenderness and frequent headaches. I have taken 2 test and both say negative, one was just this morning, i have no idea whats going on. when i was pregnant with my son i knew right away and had a positive result at 5 weeks. thanks in advance!