I’m breastfeeding and my son just turned 9 months and I still haven’t had a period. With my daughter it didn’t return until 10.5 months. It’s common but it’s different for everybody. It can start at any time so definitely use protection if you don’t want to get pregnant.
You can still be ovulating without a period yes!! You'll need to use condoms because some moms are super fertile after giving birth. Just letting you know