Ovulation while breastfeeding. Spotting question

Cailey

Ok. So I was using OPKs this cycle and got a positive 5 days ago, so I’m like 4DPO according to that. My last period was April 24. The one before that was March 21. This is my first month using OPKs. Yes I have used them before, a lot so I know how they work.

My question is, today I am having brown/pink spotting, cramps and back pain. I feel like it’s way to early to be my period if I just ovulated. And possibly 4DPO is too early for implantation bleeding? I’m sure my cycles are irregular because I am still breastfeeding number 2 (9.5 month old). It took us a year and clomid to conceive her. Got pregnant the first round of clomid. But the reason I had such a hard time conceiving her is bc I was still breastfeeding my first so my cycles were way irregular.

I guess wondering if anyone has experience this. If it could be my period even though I just ovulated or if it COULD be implantation bleeding.