I had sex on 11 dec with in during last day of my peroid,later I tool an I pill.I missed january perpid amd got a normal peroid on 13 feb it lasted for 4 days...now its 21 april and I had not got my periods.is it possible dat I got pregant after dec intercourse.well it is normal for me to moss one month in peroids..but now it is more than a month.guys plz hlp me.