Me and my partner were together. He had his boxers on but I was naked in bed. He was on top of me. I just felt his penis near my vagina for a few seconds but he didnt ejaculate. But there was a drop or two of pre ejacuate on his penis. My period got over just 3 days ago. There was no ejaculation and we didn't have sexual intercourse I could just feel it for a second. Is there any reason to be worried for pregnancy ?