I am taking dronis 30 for hormonal balance, doctor told me take it 21 days and gap 7 days and again stari first day of period, I take it for 21 days and wait for period but 38 days gone my period not occur, Doctor told me again start dronis no wait for period, Please advise me details what should I do, and when will be start next dose how I maintain the 7 days gap.