Can this be Implantation bleeding? Please help.

Mandeep

I am ttc from last 1 year. I noticed dark brown blood coming out at 5dpo this month which was nkt heavy but lasted for couple of hour but no symptoms after that. I so have very very light cramps sometimes. I do not have any other symptoms. My af is due next week. Do you think this is implantation bleeding? Should I Test? Or wait dor period to come ?