Needing some hope ladies!!

Sarah • 5 failed IUI 11/2017 fresh transfer cancelled FET 1/2019 - biochemical pregnancy 7/2018 IVF egg retrieval #2 8/2018 Fresh transfer Failed 9/2018 FET biochemical pregnancy 3/2019 FET BFP baby girl 🎀born 12/2019 3/2021 IVF egg retrieval w/fresh transf

I had my FET on the 19th. I tested 8,9, and 12 days post transfer with fmu. All were positive. The 3rd test at 12 dpt was a digital test. I know those have to have a higher detectable amount of hcg in my urine. My beta today was 21. Kind of low. I go in to have them check it again on Monday so I’m hoping/wishing it climbs!! Anyone have low hcg numbers to begin with and had a successfully pregnancy? I’m 13 days post transfer. Need some encouragement! ❤️🤞🏼🤞🏼🤞🏼🤞🏼🤞🏼🤞🏼🤞🏼