Progesterone

Anyone else taking progesterone supplements to help conceive? I saw a doctor (naturalpath) not my norm but he said I was so low on progesterone that I wouldn't get pregnant unless I started taking pills. I started the dosage he gave me and felt great (or so I thought ) then I went to my normal doctor for my yearly and she was like "why are u taking those?? There is no way to track levels as they fluctuate daily" now I'm super confused on what to do....suggestions? Success stories? Anything helps! Thanks ladies!!! :)