Doctor, my partner’s last period was on 2nd September and ended around the 6th. On 14th September, we had sexual contact. I did not penetrate or ejaculate inside her vagina. Some semen accidentally fell on her pubic hair/external area, which I wiped immediately. There was only some light rubbing, but no intercourse. Is there any chance of pregnancy in this situation, or can I be fully assured that it is safe?