Progesterone and clomid

LC
I have PCOS and low progesterone. I did my first round of clomid 50 mg last cycle and on day 21 my progesterone was only a 3. My OBGYN said he likes for it to be at least a 4 but he still thought I ovulated that cycle. This cycle I am doing 100mg of clomid. Hoping my numbers at least double?.... 
Has anyone ever had a low progesterone level (around a 4 or 5) and still conceived?