What's everyone's thoughts on slow rising progesterone?

Km • 27. Married 5 years. Our daughter Stella Claire is our entire world. Born Nov 15. 2015. Pregnant with #2 due in April.
As in, you ovulate but it takes a few days to rise. And when it does rise, it's not by much. It's not low progesterone, just slow rising. Anyone else deal with that and got a BFP?