Pregnant After 1st IUI

Shannon
Hi all! After a year and a half of trying, we saw an RE. We did Femara, Gonal-F, Cetrotide, and Novarel. My husband has well above average sperm, so the issues are all mine. Low AMH at 27, and ovulating too early with eggs that weren't mature.
I started testing Tuesday at 10 days post IUI, and got a significant positive. It's only gotten darker since then. I go in Monday for my beta, but I am a ball of nerves. I really want this baby to stick, and after all I've heard about chemical pregnancies and miscarriages I'm pretty worried. Any words of advice or success stories to tell?