Hello doctor, I found your answers really reliable and helpful. I need you help. I had sex with my boyfriend on 5th of Feb 2015. I took an ipill and got my periods six days before I.e on 18th Feb. I was expecting my next periods on 16th of march but now they are 15 days late. I took a pregnancy test after 12 days of my expected period date and it said negative... Still there are no signs of periods. Please help me please ..