Postpartum depression

Is irritation part of postpartum? I’ve been extremely irritated since giving birth. My boyfriend keeps asking if something is wrong with me but I feel fine other than irritated. And I’m irritated for no reason. Other people have noticed it too. My mother in law and boyfriend both said I seem sad. I don’t feel sad but I’m wondering if i could have PPD. I see my OB in a few days so I’ll definitely bring it up. Just wanted other people’s experiences or symptoms.