first off you two touching eachoter down there is NOT oral sex (like your title states). its possible for her to get pregnant but not very high. i would say prob not if it was qick and you didnt *** but if it was awhile then maybe precum happened who knows the only way to tell if for her to take a test whenver her periods due or late. use a condom.
there are lots of books and internet info out there on how reproduction occurs. If your pre-*** or ejaculation got anywhere near her vagina, she could end up pregnant. Oral sex does NOT lead to pregnancy. the only way pregnancy occurs is if the sperm travel up into the vagina, which can happen without actual intercourse, as i said, if any of your lubrication (precum) or ejaculation got near her vagina. COndoms are a good idea if you're fooling around and you two don't want a baby. also, birth control helps too! Good luck!