progesterone Levels

Tasha 🇯🇲/🇬🇧 • first 👶🏾 baby due August 2018
I have had this done 3 times now and both other times my progesterone levels have been at 2.2 which I know is ok for when a person like myself who is NOT ovulating. My bloods were taken on CD 4 and CD 21 and both times I have advised my doctor that I am NOT ovulating and my usual ovulation days are around CD 16 to 18.
So this 3rd time I had my bloods taken on CD 18 and my progesterone levels came back at 27, what does that mean?