I posted a similar post to this one a few days ago but didnt get much of a response and as I am REALLY worried about this I figured Id post again with some more details to see if anyone could help me. I am really worried that I may be pregnant although I am on birth control and havent missed any pills, here is what happened...

A little over 2 weeks ago I had sex with my boyfriend, he didnt use a condom but he pulled out and never ejaculated in me. About 5 days later I had some mild diarrhea about 2 hours after taking my pill (I was worried that would interfere with the absorption) 2 weeks after the sex, I had sex again and that night I noticed some dark brown discharge in my underwear. I dont know if this was caused by irritation from the sex that I had that same day, if it was just a side effect of my birth control (ive been on birth control for over a year and never had this problem), or if it could be implantation bleeding from pregnancy. So of course I immediately started freaking out and have been ever since. I'm not expecting my period for another week and I've been feeling really weird lately with stomach problems (but i think that could just be because im extremely stessed out and paranoid about this)

If anyone has had a similar experience or any advice for me I would love to hear it, I really dont know what to think! I dont feel like my chances of being pregnant are very high (although I know its always a possibility) but I dont know how else to explain the brown discharge and the weird way I've felt for the past few days