Because Of Very Irregular Periods, I Am Prepscribed By Doctor

because of very irregular periods, I am prepscribed by doctor to take "evecare " and "evion-400 " regularly, and to take duphaston after having period. All my test reports were normal. I am not having my periods still, and thus have not started the course of duphaston-10mg. Kindly advise what should i do now, unmarried and very worried.