I had a unprotected sex with my fiance on 17& 18 march nd took i pill on 19 morning..my last date for perods was 9 feb..after a week takng i pill i had a pregnancy test but it was -ve..i hv not got perods from last 11 days..plz tell me what to do m very much worid.i could evn feel a pain in my lower stomch plz reply soon