Hi am 35 unmarried, In 2017 I took primolut-n 4 times for 7 days two times a day.in November my periods lasted for 11 days (when consulted with the Dr. He said your cycle got disturb because of frequent use of the above medicine) in December again I was normal on date. But now in January it is 4 days late. I use to get my periods very regularly every month 25-28 days cycle. Can you please suggest what should I do. Please.