Is this fair?

My boyfriend and I were having a stupid fight and this is what he texted me. I felt really hurt by that, it’s not fair to use my period against me like that.

He is in general a nice guy and we have been together for long, but recently whenever we fight, he finds a way to blame it on my period. Should I just let it go? What should I do?

Update: I had a really rough day at work today and I was just trying to vent, but he kept cutting me off and didn’t even bother to listen. So, I got pissed and said that he was being narcissistic. That’s how the fight started.