Raising a baby is not for sissies

Things are going pretty well overall. Wife is starting to feel a little better and the MRI that she had last week revealed that her swelling has gone down. The hospital bed that we have in our kitchen is really helpful!! She can get in and out of bed with out re-injuring herself each time. Papito is growing so fast that he appears to be changing daily. I heard somewhere that if people grew as fast as they grow the first few months, they would be the sizes of houses at adulthood! I believe that. In any case, I am really tired right now. At night, Wife takes care of Papito until about 7:00 am when I take over for an hour before leaving for work. While this may sound good because I can sleep at night, it hasn't worked out that way. First, I go to bed now pretty late, after his 11:00 pm feeding. Secondly, while trying to sleep, I often lay in bed worrying about Wife having to be up and not sleeping. Yesterday, I worked until 8:00 pm and rode my bike about 35 miles to see clients. I was very tired and when I got home, made dinner, and then took over for Wife while she showered, and napped. Papito did not want to go down and he was fussy so I took him outside and walked around for a hour. Sleeping on my shoulder, I returned to the apartment and he began to cry again. He cried and fussed and fussed and cried and I started to feel insecure about my parenthood. Wife, not able to nap, arose and said that I had nothing to worry about, that's how babies are. Reassured, I went to bed and didn't sleep very well until the morning when I relieved Wife. Friends at work say that a pattern is needed and this will help things get better. We haven't figured this out yet. Any suggestions?