when to take pregnancy test

gauri
Hello all,
So I had my implantation bleeding for 3 days  from 9-11 nov at least I think it was implantation bleeding as the discharge was weird than periods.i took a pregnancy test today and came out negative.can anyone tell me that is this normal and when is the right time to take a pregnancy test.i was suppose to get my period yesterday but haven't got it yet as of today. Thanks... Any help is appreciated.