I was anticipating my period on Saturday and had been having some light cramping on the days leading up to Saturday. I've taken pregnancy test since Sunday and all are negative. This morning I woke up and my uterus felt like I was on a roller coaster doing flips. I have PCOS and for the past four months been on clomid to induce ovulation and this has never happened before. Is this known side effect of Clomid?

Update: still not sure why my uterus was being weird. But AF visited me today.