Menstrual cycle changed after I gave birth

Khadija
Ever since I had a baby, my period cycle just went crazy. I can't predict when my next period will be, I used to be able to keep track it. And I'm breastfeeding too, I don't know if that's messing with my menstrual cycle. So for all the first time moms, are you guys experience this? It can be frustrated sometime, that's why I downloaded glow....