I had unprotected sex Feb. 13th & 20th, both days were Saturday's. Also with the same person. I'm on birth control. I had missed about two pills the week of the 13th but took them with the Saturday pill all at once. The week of the 20th I stopped taking the pills on Thursday and didn't finish the pack. I had a week of placebo pills left and that's when I'm supposed to get my period. I haven't had my period yet and it's the 28th of February. I haven't had morning sickness but sometimes I feel a little nauseated during the day. My boobs hurt a few days ago but it went away and they normally do that around the time of my menstruation so I thought it was due to my period. My stomach turns a certain foods now and I have never done that before. Also the past few days I've been a lot hungrier than usual but I get like that around my period date. Lately I've been wanting more sweet stuff and junk food than normal. My stomach is bloated around the lower part of my abdomen. On Wednesday the 24th I noticed a rusty-brown smudge in my underwear but nothing continued after that it went back to a clear, stringy mucus or sometimes white. I read online that implantation bleeding is pink to a rusty-brown color. I don't think I'm pregnant but then again I don't know. Could I be? And also should I take a test or is it all in my head. I'm also 16 years old.