How to ask him...

I’ve been seein this guy, we go to the same club a lot and have hooked up a few times in the past couple months. I’ve know him for a while but I still don’t know him that well... this week our clubs got some live bands so I know it’ll be poppin and we both know the other is going. So obviously, we’re both planning on me going home with him I’m sure. But! This time I’m on my period! Had to bomb in on me now of course!!! He seems like he’d be down for some bloody sex, but I’m not sure how to approach talking to him about it, any advice??