Had sex with my bf a week before my period. We used a condom but not sure if there was a slip up so I’m kinda paranoid.

A week after, I felt all the usual pms symptoms like sore boobs and got my period on time as predicted. However, I’m thinking if I got pregnant from the time I had sex, it wouldn’t affect this month’s period, it would affect the next.

I was wondering if I’m safe from pregnancy assuming sperm can live up to 5-7 days and I got my period about 7 days after sex?