So I'm paranoid. Overly paranoid.. I'm 16 almost 17 years old and my boyfriend and I have been messing with anal. I was laying on my left side and he was behind me and he came inside me not wearing a condom. He came and I felt it run down a little and I don't see how it could've got in me and if it did it could've only gotten in a tiny bit . I instantly ran into my bathroom and got a hot rag and waned myself with soap... I'm on birth control and I was not conceiving at the time. It's now a month later and I am late on my period. I'm not seeing how there's any way that I could be pregnant but please help me to get some reassurance ..