6 weeks postpartum today!

Anyway....I had spotting literally a week ago. Really, just spotting. Pinkish, and was only there when I wiped after peeing. On one occasion too! (Sorry, all this TMI.)

I stopped my postpartum bleeding at only 2 weeks postpartum so this clearly isn't that. Also, I still have yet to have a period.

I guess my question is, could this be implantation bleeding?? Even though I'm only 6 weeks postpartum?