Cramping 8 weeks postpartum

Wa

My son will be 8 weeks old in a few days. I haven't had cramping since the first month of having him. I did a ovulation test Saturday night because I wanted to see if I was ovulating soon so I would know ahead of time. I had a little cramping. I did get a positive Saturday night. Now it's Tuesday and I got painful cramping right under my belly button. Do you think this can be ovulation cramps or maybe a period coming? I never had this before. With my first son I had no cramps and didn't get a period till 6 months later.

**I'm not breastfeeding