Josijo,
I am so sorry for your loss :hugs:
I am uncertain as to why your progesterone was done on cd17. Progesterone levels are routinely done for women with fertility issues/miscarriage issues or who are on fertility treatment. It is called a cd21 test which can be a little misleading as the test is done 7 days after ovulation. A level above about 20 nmol/L suggests ovulation has occured. The level you had at cd17 showed that ovulation had not yet occured. In fact if it had it would have indicated you ovulated on cd10. How long are your cycles usually?

Clearly you did ovulate that cycle and your progesterone climbed much higher than that original level or you simply would not have maintained a pregnancy that long.

Some women do require progesterone support during pregnancy - this is controversial with some obs and others not so. Progesterone levels begin to fall before bhcg levels. So, for some mindsets the progesterone falls only because the pregnancy is failing not the other way around.

I am not sure if I have helped any and I do know some women in BB who have had success with progesterone support. From my way of thinking it can't do any harm so if it is something that you have a hunch is your problem fight to be heard my love.
If you feel like sharing who your obs is I would be interested to know.

Keep coming into bB for support - you will find the loving support in here invaluable on this painful journey. Sending you lots of love...