Scared about pregnancy, please help?

Hi i'm scared about pregnancy. Okay so my question is: what are the explanations if she missed her period and then started vomitting a week after she finally experienced her period if the following situation pertains? 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 and it hasn't gotten better at all. I'm extremely scared and don't know what to do. I dont think my precum got anywhere near her vjay, but why else would she be experiencing these symptoms. I repeat we have not had sex, but these symptoms scare me.