Hello, i had my normal cycle till the February 2016, it would be on 24th or 25th every month. But then in march i didn t get it exactly on 24th-25th. i had a few PMSs but then i had my engagement on 3rd april, for which i shouldn t have been had a period. so I went to a Gyn doctor, she prescribed primolut-N. It was the first time in my life, i was taking pills. I took it from 27th march-4th april, 2 pills a day. I was surprised that it worked. Then # days after I stopped the pills, On 7th april, i got my periods. Then in the next month, though i had PMS starting from 10th may, again i had delayed periods,that is on may 23rd. now its been june 27th, i have not got it till now, though i have light Pre menstrual symptoms.