Hey! BFP

Hi! New here, first time pregnancy, so sorry for all of the questions. Due August 14 2020. IUI (intrauterine insemination) was November 22! Sooo, I’m 12 days post IUI. First HSG today 50.1 progesterone was 17.5 and they said that’s great on HSG and good on progesterone but they put me on progesterone vaginal sup. To make sure it stays higher and to be safe since I’m still having very light spotting. I started them tonight, I take 200mg 2X daily. I am still having constant cramps, is that normal?