I had protected sex on August 18, 2018. I took 2 at home pregnancy tests and had a blood pregnancy test at the doctor (the one that detects hcg) - all were negative. I know that I should realize that I am not pregnant, I'm just paranoid. I have just had a lot of lower back pain, bloating and almost feel movement (although it is probably gas). I recently went to my gynecologist and had a pelvic exam. She swabbed for stds and did the normal. Surely she would have noticed changes in my cervix or uterus if I was somehow pregnant, right?