Just gave birth and feel like crying

I gave birth a week ago. And if I’m alone in the room I have random moments where I just want to cry. I try to hold it in and sometimes I can, but sometimes I just cry. It’s randomly throughout the day, and some days not at all. I’m happy, I feel connected with my newborn, don’t think about harming myself or my child. Just feel down. Is that considered postpartum or is it just my hormones??