How soon after hcg drops will levels be 0?

Regan • Mom to Hudson James (3/27/18), Briggs Michael (10/17/19) and Henley Rae (2/23/23) and two angels (4/2017 & 1/2022) 💕

HCG levels-

1/10 - 25

1/12 - 35

1/14 - 89

1/17 - 69

😞

I have another blood draw Friday. How soon does it usually take to go back down to 0?

Thank you