Implantation bleeding or ovulation?

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Ever since I ovulated (today is 3 DPO) I've been having some lite cramping and lite spotting of both brownish and pink blood. I have never had any symptoms of spotting or cramping PO. My fiance and I are TTC out 2nd child and I didn't know if this bleeding was due to ovulation or possible implantation bleeding? We have had unprotected sex several times this month. Any insight??

Thanks in advance. 😊