My husband and I have been ttc for 6 months (it took 8 months with our son so i expected to wait) but my period has been completely predicable up til this one. I was a full 8 days late. I took 2 neg tests, 1 a few days before i should have started, and 1 on my 3rd day late... I wasnt really worried about it until i woke up with terrible cramps and back pain, the pain is no worse than usual but it seemed unusually sudden i guess. Any advice? or am i worried for nothing... Thanks!