Postpartum period

I stopped bleeding at 4 weeks pp and got my first period back at 5 weeks pp. I’m 6 weeks pp today and my period ended about 2 days ago. My period was heavy, as they were before pregnancy, but I had absolutely no cramps. I used to have horrible period cramps. I’m also breastfeeding. I’ve heard that breastfeeding will delay your period so is it okay that mine has come and gone already? I’ve experienced regular period symptoms as well, like acne, mood swings etc so I know it wasn’t just my pp bleeding coming back