Is this normal 🤷🏻‍♀️ PROGESTERONE 🤷🏻‍♀️

My first baby - 14dpo progesterone was 91!!!!! I had took fertility drugs to get pregnant (was also taking 200 mg progesterone)

This baby 13dpo my progesterone is 21.9! I am taking 150 progesterone currently

This seems so low compared to before??? But the nurse said it’s normal and continue the 150 mg

Anyone have insight on this?