So I have a big phobia of getting pregnant as I am only in late teens and I can't think of anything worse happening to me. So I do not have sex with my boyfriend ever. However we do other sexual activities like fingering, dry humping, oral and handjobs. We do these quite frequently and every time we do I develop a huge fear that I will somehow get pregnant from it. At the moment I am stressing because my Bf touched his penis before he fingered me even though his hand was dry. I always think that somehow a trace of sperm on his hand is still alive and manages to make the journey to my eggs. Because, how can we know for sure than no live sperm are on his hand? They are microscopic! I always think that each time I do these activities and don't get pregnant, that I just got lucky, and that it will actually happen the next time i do it. My periods are irregular which makes me even more stressed due to them never being on time. I've been told by my mom to get on birth control but how do I know for sure that it is working in my body and actually preventing pregnancy?