I was prescribed with Fercel XT. So after having this tablet,my periods are regular 28day cycle. If I dint have,its 32day cycle. I had this medicine this month. But 28th day I dint get my periods. But I saw some light brown discharge when wiped. I thought the period is on its way. But today is 30thday I still have nt had my periods,negative hpt,and no discharge too. What should I do now? Should I wait or consult a doc?