pregnancy??

so I did something stupid and had raw sex while on my period. He peed before we did it so it would get out previous cum and pre-cum. we only did it for less than 5 minutes (bc this pussy bomb and made him nut fast). but anyways I'm still kinda scared because I know you don't have a high chance of getting pregnant while having sex on your period but there's still a chance. Can anyone please confirm whether or not I'm in the safe or if I'm not??