I have had my period on 9 th Aug and after that no periods till now.I know I cannot be pregnant so went to doctor she prescribed deviry after doing thyroid check,thyroid results are normal.I took deviry 10 mg twice for 5 days and now it is 4 the day after stopping... Please help as what is should do...my periods have a generic cycle among 30- 40 days but 67 days is too much.