JAYBAY, if you're reading this, please post.
I have no comment about your son's problems, that's getting a step ahead. But I very much want to say something about your problems. I am not an expert or a doctor. But I am a concerned forum member and I see nothing but red flags.
I believe you are in need of surgery and emergency hospital care, immediately. You have a massive infection, your bowels are completely screwed up, and the whole thing has gotten so bad, your body systems are shutting down, and the mental collapse is a symptom of this, and this goes on much longer, you are at risk of very serious complications.
I do not know why the physician who made the CT findings did not hospitalize you right then and there. I personally am shocked. Perhaps he thought you would visit your regular physician and be referred in that manner. Or perhaps you live in a small community and they don't see this sort of thing very often. In any case, you need to go to a much larger hospital and medical community than where you are now.
You should try to go to the ER of the largest university hospital near where you live, forthwith. Or if a teaching hospital is too far, go to the largest city hospital ER in your part of the state. Really, any Trauma One center will do.
Print out just the first paragraph of your post, put it together with both of your CT scan reports, and take them with you to the hospital. Telephone your general physician and telephone your relatives, let them know what's going on. Begin to make arrangements to go to the hospital. Line up your child's care, and ask someone to accompany you to the doctor. You have simply got to get top health care straightaway. And if those confounded docs in your town slow you down, ignore them. Continue making plans to get to a hospital.
Forgive me if I am overreacting and off-base, but I am just so disturbed by your post, that I cannot just stand by and say nothing.
Wow.. All in your head! How stupid.. Listen, I have been in your shoes doctor's can't figure out what is wrong so it must be all in your head.. but let me tell you my husband died may 2006 with colon, lung and liver cancer.. he was told it was his back, they did surgery on him. He had countless cat scans, mri. pet scans.. yet he was yellow. Lost weight.. was sick as a dog.. they put a cell stimulator around his waist a battery operated piece of equipment.. that was suppose to heal his back surgery he wore it 6 to 8 hours a day ... surgery in June.. by Oct.. he was still so sick.. I made him go see another doctor. Who took one look at him and said CAncer.. they did a colonscope.. the tumor was so big it was about to block his colon.. they had to give him emergency surgery to have colon bag to poop in.. sorry don't know the name of this... Now you tell me how this back surgery doctor didn't know my husband had all this cancer??? Did the cell stimulator make the cancer go nuts??? who knows nobody would answer my questions.. My husband died because nobody cared.. Your son and you need to find help.. I wish I could give you some sort of answer.. but no do not take it is all in your head as a legit answer.. best of luck,, and do hope to hear how things turned out for you.