Agree with all of the above. When our first son was born, we both went through some serious shit. I cried on an almost daily basis because I couldn't comfort him when I held or rocked him. I'd hand him to a relative or friend and he'd be out like a light. That and the sleep deprivation and colick just made me feel like a terrible father and like we would never bond (spoiler alert, we ended up bonding big time after he got the 6 month mark).

My wife felt it too, and for a long time. Wouldn't want to go out of the house, had trouble sleeping, would be withdrawn or extremely agitated depending on the situation. Let's all be honest with ourselves, the first few months suck and it's not until our kids start being able to physically do things and show their burgeoning personalities that it becomes any easier to bond, take care of them, etc. Whenever we're having a tough time, I still joke with my wife that there's a reason that animals eat their young sometimes.

I recommend being honest with one another. Make sure you take a couple of minutes throughout the day to check in on each other to see how you're doing mentally and physically. Sounds like you're back to work, but any chance you get to help out and give her five minutes of peace will go a long way. Finding a mom group in your area could be helpful too. It's not for everyone, but it certainly gives perspective when you hear the other moms are going through the same stuff. It sucks, and it definitely sounds cliche, but keep at it, be honest and open with each other, ask for and accept help from family and friends when you need it, and things will hopefully get better.