Why Haven T I Gotten My Period After Using Regestrone For Four Months, Despite Having PCOS And Thyroid Issues?

I have pcos and thyriod from past 3 years I was not having regular periods.. i used kimson 35 tab once once it made me woste (my skin became dull I lost my glow and tone of my skin)...my doctor suggested me change lifestyle and diet include exercise when ever I m having an irregular periods use 5 days tab registrone ... i was not having periods naturally I was using registrone from last 4 months this time I didn t get my period even after using tablet