Can’t stop crying

I had my baby a couple days ago and I am so in love with her. The only thing is, since giving birth I am an absolute emotional wreck. Crying at the drop of a hat over nothing, literally nothing at all. And then crying over things that aren’t even a big deal. I feel like I’m doing all the wrong things and I’m not a good mom. My husband is so comforting and sweet and tries to make me feel better, but I just can’t get past feeling like I’m not good enough for my baby. How can I get past this? Do I need to seek help from my doctor?