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 inside my vagina with his boxers on (he didn't remove them at any point in time) for a few seconds with his boxers on but he did not ejaculate. But there was a drop or two of pre ejaculate on his bovers. My period got over just 3 days ago. There was no ejaculation and we did t have sexual intercourse I could just feel it for a second that too only through the boxers. Is there any reason to be worried for pregnancy?