Basicaly, i am on my periods and i just had sex, thing is he ejaculated on my body and some rolled down and might have touches the lips, like just the front. can i get pregnant for that? im quite sure not but i want to be sure, urgent :?

If you are truly on a menstrual period it is almost impossible that there would be an egg available to get fertilized by sperm, even if sperm got inside your vagina - which would not be likely with what you described- thus almost impossible to be pregnant from this. But remember, there are lots of sexually transmitted infections out there (herpes, HIV, Chlamydia, etc), some of which have no cure