Is This Implantation or AF?

I'm about 14-17dpo and af was due between Jan. 11th-14th. I had some mild cramping a couple nights ago, but it only lasted for maybe 4 hours. Yesterday I started slightly spotting and I just KNEW that it was af showing her face again. I normally have quite heavy periods, and I always have. But this time, the light bleeding just stopped. Normally by now I'd be flooding, but its completely stopped. I'm on CD34, and I normally have 30-31 day cycles. So for af to be late, and me to have this weird spotting that just suddenly quit, something's off this cycle. Do y'all think it's AF, implantation, or something else?

****WARNING! Graphic photos below!