My period was supposed to be 10/1. I am cramping and my boobs hurt more and more every day! I came off of the pill in late July and got a period right when Expected in August. My period due 10/1 still hasn't shown. I have taken 2 pregnancy tests and both negative. At what point do I call the doctor and request a blood test? I have an apt with my primary tomorrow for an allergy test follow up. Should I just ask him to do the blood work or should I see my OB?