advice

Hi.. I had been on the cerazette pill since bout april 2013. After I had a d&c in December 2012 .. stopped taking the pill November 2013 had a heavyish bleed 29th Nov 7days then had a light brown bleed from 9th dec for 2-4days.. I found out in sept I had chylmida but took tablets for it and assumed it gone Me and my partner are ttc.. I have taken pregnancy test they say neg.. I am worried I cant get pregnant Can someone please help me