Low progesterone

Kamryn
Well....got a call from my dr today..after losing a pregnancy at 9 weeks only on dec 1st 2015, then getting a positive home test almost three weeks ago, hcg the 11th was 290.5 but progesterone was low so started taking 200 mgs a day, then the 13th hcg was 641, and blood work yesterday showed hcg was 6,721! But progesterone levels are STILL low even after taking my medicine as prescribed. Why are my progesterone levels so low? I do have PCOS and i know women with that have lower progesterone...but why? So now im taking 400 mgs a day and getting my progesterone checked again next Wednesday...anyone have low progesterone but still have a healthy pregnancy and a healthy baby?