Hello doctor ,my name is anitha age 24,perviously i affected with ectopic pregnancy in the month of may 2010,now i am ok every time my periods are getting late by 2 to 3 days,in the last month 28 oct i got the periods on 28 nov me and my husband met sexually still now i did'nt periods i tried the pregnancy test and it is showing -ve.wat is the situtation please help me out.