Period sex

Today is day 6 of my period. Usually it only lasts 5/6 days but I’m still bleeding. I have a dick appointment w my boyfriend tomorrow and I really wanna have sex with him BUT I don’t know if I’ll still be on my period. He’s open to period sex but here’s my points

- were both virgins

- I don’t know how messy this could get

- we don’t have too much privacy as it’s at his parents house and we’re not trynna get caught.

I’m on birth control & we’ll use condoms too but I’m very nervous; any advice/tips ???