Cycle Confusion

Lana

I had a miscarriage about a month ago and so I didn't think we could try covienving this month. The last three days I had some really light bleeding, and not enough to fill a liner. Today, I took a pregnancy test and got a SUPER faint line meaning positive. I am confused because I thought I got my period but could it have been implantation bleeding? I didnt think implantatiom bleeding would last so long. Any thoughts? Wondering if I should go in.