My girlfriend and I both lost our virginities to each other on May 8. It lasted very quick, a minute or so, and I was wearing a condom (thought it was a larger size than my penis, it sealed the tip up pretty well). I did not ejaculate, as I did only a few thrusts. Her last period was on April 25. She's currently on her 33rd day today, but still no menstruation. Her cycle is irregular, though.
She isn't experiencing any pregnancy symptoms. She is however a bit stressed out by this whole thing. What are the chances that she is pregnant?