Postpartum Depression

I think I might have it but I'm just afraid to admit it really.. I've had depression before my pregnancy aswell. I've suffered from depression, anxiety, and PTSD for a few years going back to when I was 14. I'm now 18. Ever since I've had my baby things have been so crazy and my emotions are all over the place. After my sons head came out, everything went down hill. He ended up with a cracked collarbone and since last week Wednesday we had to come into the hospital because he had a fever. He was only 9 days old when we brought him in. And we'll be here till August 3rd. I've been feeling so sad and down lately because of everything. There are even moments where I feel really sad for no reason and want to cry. Its stressing me out so bad because it's effecting my milk production so I've been supplementing formula for my baby. I don't know what to do right now. I feel so broken.