Hi dr , My Name is Chaya 18/09/2013 i got abortion and after 4 months(oct,nov,dec.january) regular periods and February month i got 4 days early period 15/02/14.now 20days latestill now no periods ,home pregnancy test negative ,blood test also negative.i cons let the dr told to take 5 days Primolut N 10 mg tab i took last 2 days but still no perid and pregnancy test will show in negative and blood test also what is the reasons?