Implantation bleeding!!! Help.

Okay so on 1/07/16 ( 9 dpo) I had dark brown Mucousy discharge, (never experienced this before) that only lasted a couple of hours and only saw it when I wiped. Nothing on 1/08/16 then on 1/09/16 & 1/10/16 (11&12 dpo) it was light brown with some reddish tinge, as shown below, still only saw when I wiped. This morning I wiped and it is super faint brown mucous and AF is due to come tomorrow. Is this implantation bleeding? When should I take a pregnancy test?UPDATE!!!!!
Just went to the bathroom, and again this is only when I wiped... Advice please:)