Period after baby

Hello! I had a baby 2 months ago and am breastfeeding. The last 2 days I’ve had pink/reddish mucus discharge. It’s not a lot, more just when I wipe after peeing it’s on the tissue. I also have had unprotected sex a couple times in the last 5 weeks. So I’m wondering if it’s my period starting, or maybe implantation bleeding? I’ve had some cramping too, not terrible tho and I know this can be a symptom of both too. Any input is appreciated!! Thanks!!