period sex

Okay, so my periods are ALWAYS 5 days. I stopped bleeding this morning so I was on my period for 4 days. Well my husband and I had sex yesterday (the 4th day) I am not on birth control, we were unprotected for maybe a minute or two (in the shower) then he put on a condom and finished in the condom. I'm just freaking out because it's always 5 days. There's no way I could be pregnant right?