Help! Don’t know if it’s my period

[Nikki_0919]

Hello guys,

I really need help I been trying to conceive for a while and I had my ovulation on the 20th of October and my period was expected on the 3rd of November, but has not arrived until today November 8th so far it’s not like my regular period it’s coming down as a brown color , I have been advised that implantation bleeding has to be before my period starts. I did as well take a couple of test but resulted negative.What can this mean ?