Baby blues vs PP anxiety ?

My baby is a week old today.. the first few days at home I was so anxious that something was going to happen to him/that he's not eating enough and I'd just cry and feel incredibly anxious. That has gotten better, but I'm still overly worried about the smallest things. I still cry randomly and I'm worried I'm not bonding well with him. Is this normal for the baby blues or is it something more?