Tips?

I’ve noticed that during my period, my fuse is basically a centimeter away from exploding, and my fiancées always the one in the fallout. Today he asked me why I’m so mean to him, and honestly I’m not even sure. I tried to explain to him that it’s not really him I’m mad at, but at everything. I have a short fuse normally anyway, and I’m trying to work on it, but when it’s “that time of the month” I become a monster, and I know I do. I don’t want things to go south for us... Tips on how to better handle the spurts if anger???