What an asshole. What should I say in response to this?

Me & the guy I’ve been seeing for a while now we’re supposed to get together tonight. However, I ended up getting my period & I thought I should let him know before the last minute. This was his response. What should I say? If I should say anything at all. Anytime I get my period it’s like he’s super inconsiderate. Btw, he’s not young either, 28 years old to be exact, acting like he’s never dated a girl with a period before.

*Update*

I have tried to hangout with him in the past while on my period & he always makes me feel guilty, like I’m bringing it on myself or something. He says things like “that’s disappointing” because we can’t have sex.