I had sex for the first time with a condom but when changing positions it slipped off and was hanging from my hole. I pulled it off and immediately washed it with water & soap. I don't think any semen got in me but I didn't know for sure. My doctor had me take like an overdose in birth control pills that she said would be used as an EC. She said I had 21 days to get my period but it's been about a week and no period yet. I am getting really scared. Also I took the EC between the 3-4 day. When am I going to get my period? It's been a week since I had sex, can I take a pregnancy test and it be accurate?