Hello, My girlfriend and I were engaging in foreplay and

Patient: Hello,My girlfriend and I were engaging in foreplay and for the first time and for roughly 5 seconds I was inside of her, but barely though. I’d ejaculated two times not too long earlier that evening, so I didn’t feel as if I had enough sperm in my system for premature ejaculation to come out let alone to ejaculate. I felt dry and then after I pulled out the tip was wet (because of her). Since then, though, we have been worried about the chance of pregnancy.. Her period is due this week, and this event occurred on the 27th of February. To avoid this kind of scare again though we’ve promised to be safer and exercise abstinence. Should I be worried though?Thank you.

Doctor: