Late implantation bleeding?

Li

Anyone ever heard of late implantation bleeding? Today I am 13 dpo but period not due for about another 5-6 days as I ovulated a week early this month. I had a 0.63 bbt dip today and now this when I wipe but just once. What do you think? Am I crazy to hold onto a sliver of hope? Took a hpt today and so far bfn :(

2-6-18

Now today 2-7-18. No bleeding throughout the day but noticed this once more today when I wiped