Is It Normal To Have A Delayed Period After Stopping Duphaston, Or Should I Be Concerned?

Hi I was taking duphastone for 5 days two time in a day my last dosage was 7 days before but till now I didn t get periods my previous record of periods was absolutely right only for 3 month I felt irregularitiy and my doctor prescribe duphastone I m 20 year old and not married. For some days I felt period like feelings but not actually coming is it worrisome