My menstrual cycle was on 13th of this month and since it did not happen, due to a function on 16th I took 5 tables of Primolut N till 16th morning, 2 each day.Even till 23rd, since I did not get periods and doctor prescribed 1-1-1 Deviry tablet, 10 gms for 3 days. Even then till now, I have not got my periods. Please guide. My pregnancy test was negative though I didn't undergo scan. My periods is very regular and I had never faced such a problem before.