Marci,
What you are going through is normal, if such a word can be applied to the rocky road that parents of severely premature infants experience.
The good news is that many of his problem thus far might be attributable to the bowel perforation, and he may rally significantly once he is well enough to have his abdomen closed.
The bad news is that you are exhausted, both physically and mentally, and the road is not over. One of the most important things you can do for your baby during this time is preserve your SELF. Rest, food, and some activities that aren't focused on his well-being are critically important, both to keep YOU well, and to maintain you as a resource for him, when he gets to the point where you can really offer him a great deal.
Have you taken a day away from the hospital since he was born? Are you sleeping well? Have you had dinner with friends? Seriously, you need to do these things. Take care of yourself, both because you are important to you, and because you are the most important resource for Jameson.