Estrogen levels during FET?

What were your estrogen levels during FET cycle? (And did it lead to live birth?) I was supposed to transfer tomorrow but at my lining check on Friday my estrogen was only 72 so they upped my estradiol and pushed the date. I got rechecked this morning and it’s only gone up to 100. They scheduled me for a transfer for next Thursday, but is that still too low?

I’m concerned that even if my little snowflake implants that my body won’t be able to support a pregnancy if my estrogen is so low.