Is my CD2 estradiol too low?

My OBGYN wanted me to get some CD3 labs done, which is conveniently tomorrow (Sunday) and no labs are open. She said it would be okay to check them today (Saturday), aka CD2.

These are my results, I was worried that my estradiol was too low but now I'm reading mixed things online that low is okay as long as it's above 10?

Estradiol: 18 pg/mL (reference range 21-251 for follicular phase)

FSH: 4.05 mIU/mL (reference range 3.03-8.08 for follicular phase)

LH: 5.6 mIU/mL (reference range 1.8-11.8 for follicular phase)