Last night me and this boy were hooking up in his car. I gave him a blowjob and then he ate me out, and then I gave him another blowjob after that. A lot of this time I had my shorts on but my underwear is lace so I am worried if any of the sperm got into me through my lace underwear. Also, I had a tampon in because I am on my period, so would that have blocked out any of the sperm? We didn't have sex but I am still worried if I am pregnant.