I have had unorotected sex with many guys and at least 4 of them have finished inside me. I know i shudnt have unprotected sex blah blah but thats not the problem. Im only turning 20 so dont want to go to a doctor to see if im fertile or watever they would do. i have sex at least 4 times a week and nothings happened. My sister had unprotected sex twice and shes pregnant. I slept with the same guy she did and im not :/.