Our first child wouldn't sleep more than two hours at a time. He only slept if someone sat up and cradled him in one arm, like a football. I felt like a zombie most days, passing through life, not sure where I was or what I was doing. To complicate matters, my wife and I were both in our early 20s. I was in college and working as a bartender, and Mel worked full-time at a hardware store, so there wasn't much time for napping or sleeping in.
This was in 2006. I complained to my older sister about it, and she gave me this advice. "Just let him cry. It's rough for a few days, but all our kids slept through the night at 3 months. It works. I promise."