Pregnancy

So I know this is a stupid question but can u get pregnant while on your period?? I just watched an episode of gray’s anatomy where this girl has 2 uteruses and thus allowing her to have her period & be pregnant at the same time.. but I know you shouldn’t believe everything on tv, but I’m still curious. Also if this wasn’t a factor (having 2 uteruses) could u get pregnant if someone ejaculates into you while on your period?