is my girlfriend pregnant?

[bsd915]

One day my girlfriend and I were on a bench in public and we were in the mood for sex. We didn't do it however, she only gave me oral for like 10 seconds and I just fingered her. The only thing related to sex was when she sat on me when my penis was out and we attempted to have sex. We basically just rubbed our parts together for like a second or 2 but she got off me right after. What im concerned about is if there was pre *** and if it went inside her. I didn't think this would be something to worry about but weeks later she's been explaining how she's having the same symptoms of pregnancy like cramps and sickness and now I'm worried. Recently we had sex but it was with a condom on and when I ejaculated I did on her face so I'm not worried about that, I'm just worried on whether she's pregnant or not from just rubbing each others parts. Is she pregnant?