Normal or not

I’m 5month pp Im breastfeeding not on any type of birth control and today I have been have really light spotting and when I wiped it was pink I used a pad incase it was period which I haven’t had since I had my daughter we have had sex just using the pull out game I’m not preventing getting pregnant but not trying either if it happen will be more then happy could it be just old blood or period or implantation bleeding Its been two days and it’s gone when I wipe there nothing

Update

Never started my period so next week I’ll be testing just incase