New Dad to a newborn. I'm really struggling.

My son was born 4 weeks ago and I feel completely depressed and hopeless. When he was born I felt so much joy and so connected to him, but the past week or more all that joy has just dropped off. The oxytocin wore off I guess.. I don't know if it's the loss of autonomy, the sleep deprivation, or the idea that my life (that I liked) will never be the same again.

My son I would say is pretty good and relatively easy going for a newborn but still I find myself frustrated with him when we won't sleep, and in the darkest hours when I just cannot seem to get it right, I find myself wishing we'd never had a kid or that it was a huge mistake, which makes me feel guilty for even thinking.. My wife and I both are at home so neither of us is really getting a break either, and we're starting to fight.

I just need to hear that this is normal, or that someone else is feeling this way.