When does the medication stop?

Hi guys! Been wanting to know if there is a certain range of Progesterone as far as levels or time range that they look for after 3 successful Betas to take you off PIO shots and same for Estrogen. I only have enough to get me through 30 days of my cycle and from what I’ve heard they keep you on this for pregnancy weeks 10-12! This is a concern for me that I will definitely ask my clinic about but wanting to know what’s normal or anyone with similar experiences. TIA 🥰🙏