TMI!! Implantation bleeding??

Vic(Tori)a • Proud mama to the most precious little princess 💖💖 trying for #2

I'm on CD 22 about 4dpo. I went to the bathroom and wiped and this was on the tissue, little bit pinkish.

Could this be implantation bleeding?

I haven't had any other symptoms besides fatigue and yesterday I had a bad headache.