my last period started on the 4th and ended on the 9th of september and is due in a week, however i had unprotected sex with the person i’m dating on the 15th and the 22nd of september ( when i could have been ovulating), for most of the duration on both occasions a condom was used and it was only unprotected for about a minute each time. He didn’t cum inside me but I know that there could have been precum and was just wondering what are the chances of me being pregnant from this?