When I was 5 1/2 weeks pregnant, I had bloodwork done, and my progesterone was 7. My now former OB put me on 200mg oral progesterone once a day. When I saw my primary doctor a few days later for an unrelated issue, she asked why I was on the progesterone, I explained, and she told me that she'd recently taken courses in this new technology and wanted to adjust my progesterone and start testing me herself since I was leaving my OB for a MW and wasn't seeing her for a few weeks. She changed my oral dose to twice a day, and added in 200mg progesterone in oil injected twice a week. After two weeks, my progesterone level was 21.7 (at 8 weeks, after not taking any for 36 hours before the test. She said that was still too low and now also added in vaginal suppositories. She also said it's likely that I'll be on all these forms of progesterone my entire pregnancy.
Everything I've been able to find through talking to friends who have been on progesterone and online indicates that a level of 21.7 isn't all that low, and that even if progesterone supplimentation were necessary, once a day oral would be sufficient. So really I'm just wanting to hear experiences from other moms who have been there and what their levels were and such, because this seems like an incredible amount progesterone for me to be taking.
It wouldn't be as big of a deal, but the side effects are making it incredibly difficult for me to care for my four older children-none of which I ever needed progesterone supplimentation with, and I've never had a pregnancy loss. So I don't feel like there is a history to be especially over-zealous with precautionary measures.