I'm scared about pregnancy but don't know for sure. Please help.?

Hi i'm scared about pregnancy. My girl and I have never had sex but we do do other things. We've done oral, used hands, and showered but i've never jizzed when I was with her. I've fingered her and she's given me jobs, and when we showered my privates touched right where her pubic hair starts. She had a late period last month leading to it coming this month, and she has been feeling nauseous and been vomitting for the past three days. I'm extremely scared and don't know what to do. I dont think my precum got anywhere near her hoohah, but why else would she be experiencing these symptoms. We're both high grading students, and we can't have this in our lives right now. I repeat we have not had sex, but these symptoms scare me. is it possible that she may be? I am so scared.