BBT drop & Progesterone Suppositories

Crystal • 1st IUI: 11/14/15, BFP 11/27/15! Miscarried 12/4/15. 2nd IUI: 12/20/15, BFP #2 1/2/16!!!
I did my first <a href="https://glowing.com/glow-fertility-program">IUI</a> this time and I'm getting worried. I'm at 9dpiui and I had a huge temp drop over the last 2 days. I read that you won't get a temp dip with progesterone. Any insight?