Taking progesterone while pregnant?

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I’m in a dilemma.

I currently have endometriosis which caused me to have fertility issues.

When I finally got pregnant with my first I ask my doctor if I needed to take anything during pregnancy to help avoid a miscarriage. My doctor said that with endo that hardest part is getting pregnant and that “keeping” the baby isn’t typically an issue.

That pregnancy went great!

Now I am pregnant with baby #2 and have a new doctor. She wants me on progesterone (though she has NEVER checked my levels) and states I could lose the baby due to my endo.

Ummmm I don’t know what to do. I am a little scared to take the progesterone.

Any insight? Anyone taken progesterone during pregnancy? And what did you take it for?