Implantation or Ovulation bleeding?

Usually very regular apart from this one cycle, never had spotting ever. Also had a baby 6 months ago and haven’t been on my best behaviour of tracking Aunt Flo as I usually would. This was a few days after ovulation. Period is due tomorrow. Been using pull out method x sorry is pic is TMI but that’s all I took a photo off quickly as I was at Disneyland. Was wiping light pink for two days hardly anything and not every time I went to the loo sometimes it was clear. Has anyone experienced this? Didn’t seem like a clot either. Thanks