Orgasms/ AF?

Ok here’s my story. I’ve never had orgasms on the same day the expected AF is due to show up. I had a miscarriage 1/2 way through the pregnancy back in September. Now ever since then I’d wake up with orgasms ONLY on the day AF is expected to show up. No other cycle days I’d wake up with orgasms but only AF. Mind you, no sex dreams. Anyone else have the same experiences?