Hello Doctor, I need advice regarding a possible pregnancy risk. My girlfriend and I spent time together on September 13. We did not intend to have sexual intercourse. We did not use a condom. I had an erection during the activity, but my penis remained dry. I did not notice any semen, pre-ejaculate, or other discharge. There was no ejaculation and I did not reach orgasm. My penis was mainly around the vaginal opening. I am not sure whether the tip may have gone slightly inside for a very brief moment. I did not feel that it had entered, and because the penis remained dry, I assumed there was no penetration. She felt mild pain at that moment, so I immediately removed it. After we stopped and came outside, my penis was still erect for a short while and then became normal on its own. There was no discharge or ejaculation at any point. Her expected period is around September 28–29. Since September 13, I have been extremely anxious and worried about the possibility of pregnancy.