Making decisions while on my period

I've been with my (now ex-) boyfriend for 6 months... And i know myself well enough to have the feeling that i never make good decisions while I'm on my period, or a few days before getting it.. So.. We've been struggling lately, mostly because i'm quite "bipolar" during relationships.. I go from "i love him and i want to spend the rest of my life with him" to "i hate him and I never want to see him again"... We started as best friends so we know each other well. The past weeks have been an emotional roller coaster for me. My little brother got really sick, and nearly died. Plus the stress at school. It wasn't very nice and it affected my relationship with my SO.. On monday I called him and we decided to break up.. One day before my period. So now I'm not sure if i made the right decision. It really hurts.. Thanks for reading 😊