Is this implantation bleeding? Please help a TTC hopefully soon to be mommy.

We have been TTC baby #1 since May, I am hoping to get some insight as to if this is implantation bleeding or not. According to ovulation tests and Glow, I am 10 days post ovulation. The past 2 days my breasts have been slightly more sensitive and I have felt slight twinges like an extremely mild cramp every once in a while. AF is due Saturday (8/26) and I am always on time, if anything a day early. So today when wiped I had a slight smudge of pinkish blood. And then again when I wiped tonight this is what it looked like. For those of you with experience with this, can you tell me if you think this might be implantation bleeding? And if so, when should I test? Thank you all!