We were making out and her undergarment was on. i was without my undergarment. semen was released on her undergarment. any chances of getting pregnant?

Not really, but...: Things happen when the undergarment comes off. It should the first line of defense against pregnancy. Keeping the underwear on, and then a pair of Levi's button-fly jeans with really tight buttonholes... that usually works. Once jeans and underwear come off, one has to rely on condoms, birth control pills, etc... Condoms are sold everywhere, so keep some handy if one cannot keep those Levi's on.