TTC for 8 months, now starting progesterone

Hi all! My husband and I have been TTC for about 8 months now with no luck. I stopped BC pills 8 months ago after taking them for about 6 years. My periods have been long and irregular ever since getting off BC(anywhere from 35-52 days). I have taken OPKs and usually get positives very late in my cycles. I finally went to my GYN because as I’m sure you know, TTC is so hard when your cycle is abnormal. He did not run any tests but said because I’m young and healthy with no underlying conditions, it is likely that I’m just not producing enough Progesterone. He called it Luteal Phase Defect (LPD). He prescribed Progesterone (medroxyprogesterone 10mg) and instructed me to take 1 tablet for 10 days every 25 days to induce my menstural cycle. He is hoping that this will cause my ovulation to start happening at a more regular time in my cycle and increase our chances. I will do this for three months and follow up. Has anyone else had a similar experience? If so, how soon after increasing progesterone did you get pregnant? This is only the first step and we will do further testing and treatment as needed but he said more is less when TTC. I’m just so impatient and so badly want to start our family! Thank you so much! 💗