Ok so in august I had sex with a guy, I didnt know him to be honest!! I've never done this before!!! but I am on birth control for over a year and I did use protection.. I have gotten my period every month since then when Im supposed too on the pill, and its been the same length like normal.. but Ive gained weight!!! and there was a time my nipples were sore! I have never had sickness, but I still thik I could be!! I took 3 test all negative, and I went to the doctor and she said it was negative too, I also have a pap smear and they didnt tell me anything (idk if they could in one of those) but I still feel like I am!!! I think it just makes me nervous cus Ive gained weight! I thought it was my thyroid but they tested it but it came back normal!!! Im just worried!!! I guess cus I didnt know him!!! Could I be after all the negatives and periods every month??