Period while breastfeeding?

Priscilla

So I had my tubes tied after I had my 3 rd baby 4 months ago. I feel crampy and my nipples do feel a little tender and I wonder if it’s because I’m going to start my period. With my other 2 that I breastfed as well I didn’t have a period until after we were done breastfeeding so I’ve never experienced this while breastfeeding. She’s EBF and she has been going a little longer at night the last week. I don’t have any bleeding yet but some discharge. Anyone else experience this before while breastfeeding?