Delayed Periods and PCOD. Hgt-5'2!

I have PCOD (my cycle is 1 month 15 days at the age of 15 my period got delayed reports are normal due to less blood got my period late  after 4 years my period got delayed almost 3 months then I came to know I'm diagnosed with PCOD, used english medicine, homeopathy). Now trying to conceive for a month  but have faced irregular periods. My UPT tests have been negative, and after not getting my period, my doctor initially prescribed Meprate for 5 days, which triggered my period within a few days. However, six months later, when I faced the same issue, my UPT test was again negative. After taking Meprate again for 5 days, I still did not get my period, so my doctor has now prescribed Primolut N for 3 weeks. I'm curious as to why my period hasn't returned yet, even with normal reports (such as AMH, thyroid, etc.) during my fertility tests, and what could be the reasoning behind using Primolut N for an extended period. The only issue identified so far is PCOD. Wt 51-52kg, Age-28, hgt-5'2