Hi Doc! I am 25years old and i have a very regular cycle. I am a flight attendant for almost 4years and wondered if this has something to do with my problem. Can it be the reason?I started taking yasmine for 2yrs and stopped for 6months. The first 3months,i had my period. The last 3, i didnt get any. I started having pimples (one per month) Consulted an OB and prescribed duphaston 2X/day for 5days. When should i expect my period?