Af or implantation?!? *****Graphic****

I don't wanna get too graphic with pics but I wanted to at least get opinions. Period is 7 days late, according to glow. Hubby and I had sex earlier today around 10ish and I started having cramps so went to the bathroom to poop, (sorry if tmi) and I wiped and saw something like what's in the picture but brighter red in color. Went to check again and its gone, but I still have very mild cramping. Any ideas? I tested before this and were all negative. Help!!!