Looking for a little advise

Leia • I'm gone deleting the app. Saw 2 different posts where the spelled heart hart. Can't handle stupid people.
Do I or don't I use progesterone cream?
MC May 19th 2015
Cycle 1 - 31 days & O'd cd18
Cycle 2 - 29 days & O'd cd17
Cycle 3 - currently on cd29 & O'd cd24. 
My cycle average is 30. I'm worried that I'm not going to have a luteal phase. My progesterone is on the low side. I had to take it when I found out I was pregnant but still mc'd. 
I feel like I'm going a little crazy & overthinking it.