I had sex back in oct. We used a condom but when we finished we noticed some slippery white stuff on the outside almost positive it was ***. But he had stopped before he fully came and so it may have been precum or whatever but it came out the base of the condom. I took emergency contraception a day or so after and had bleeding like 2 weeks after which was 2 weeks before my scheduled period. I have had a period every month since. I took a test a month after and two months after. Both came up negative. I may have gained a little weight but nothing greatly noticeable. My clothes got tight but I don't look pregnant. I've been tired lately. I've noticed stretch marks but I've been trying to lose some weight anyway. I've had some aches and pains here and there but I'm very stressed lately too. What are the possibilities that the small amount of sperm on the outside of the condom got inside me, the contraception didn't work, both tests were wrong, having a period every month didn't stop it, and I'm pregnant? I'm very worried cause the signs seem to show I could be pregnant but it seems that all odds are against it? Why Am I having a period every month if I'm pregnant?

You do not have periods when you are pregnant. You can have spotting though. Everything you wrote suggests that you are most likely NOT pregnant. If you are truly worried, see a doctor.

Have you had sex since? Protection? - Are there other contributing factors to your symptoms.. Stress (you mentioned).. . anxiety, depression. I recommend "chilling out". . And get your mind healthy. (that isn't me calling you crazy.. lol. Just get yourself in a good mindset... excersize, diet, etc.)

Since everything is actually indicating that you are not pregnant, I suggest seeing your doctor. Possibly even a therapist.