(TMI PIC) is this implantation bleeding?

I've had this for the past few days. I am 4 weeks postpartum I gave birth to my son at 22 weeks gestation :(. We have had sex a few times and he pulled out so that is why I'm wondering. I have an appointment with my doctor next week I just wanted to know if others had this. I can't tell if it's still postpartum bleeding or not. The only symptom I had that was with is was mild cramping. 

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