 [ Symptoms ] i had sex with my boyfriend friday night but he pulled out but got sperm on my underwear can i get pregnant from that [ Disease ] hi janette if you play with fire you will get burnt yes well if you have sex with a guy without any kind of bc then at sometime you will get pregnant and that is even if he pulls out as there is a good chance that he could have sperm in his pre cum all you can do now is wait to see if you get your next period if its a missed one you do a hpt on your first missed day but you cant get pregnant from sperm on your underwear you will have to see how things span out if your not pregnant then get some kind of bc and you should always carry condoms may not what he wants but safer than bare back riding why did you not think of plan b on saturday would have got rid of your worries do hope there is some help here good luck