7 dpIUI bloodwork (estradiol levels low?)

Caroline • mama to Haley, born April 5, 2018 & Emily, born April 22, 2020 🎀
I am 7dpIUI today and had bloodwork done. My Estrogen seems very low to me at 62 pg/ml and my progesterone at 32.6 ng/ml is fine. They said they'd only call if something was wrong and they haven't but I'm very concerned now. I take 2mg of Estrogen twice daily. I've read that it should be at least 100 at this stage...thoughts? Should I give the clinic a call?