I was wondering if anyone could give me any insight on my situation. My period is 20 days late. I have taken a few HPT's and they have all been negative. I have been nauseous the last week and a half. I have also been EXTREMELY moody. I have had cramping, lower back pain, and severe headaches. Is there a chance I could be pregnant? I have a doctor's appointment on the 18th but I don't want to look crazy thinking I could be pregnant and then not be. Does anyone have any advice on this topic?