T.,
He may need you to step out of the box that your location and inusrance has you in. I would make an appointment with a nero-psychologist and get him a good diagnosis. He is probably too old at this point for a Developmental Pediatrician, but you could try there too. They can be found at the nearest childrens hospital. You may need to drive him to a psychatrist who can help him.
Strattera can cause the kinds of problems you discribe, and that means that it is not the drug for him, and he needs to be carefully watched and his medication mangaged for months by someone who will see him as often as necessary. You may never find that on your insurance plan, you may have to bite the bullet and pay for it. It is one of the dirty little secrets about mental health issues, sad, but true.
If he has a mood disorder, anxiety, and inattention, you need very careful management because all these issues will require medications that can acacerbate the other conditions. It is a balancing act, and you will not find one wonder drug or dosage to fix it all. I will likely take many months of careful managament by a skilled prescriber.
You should get a good diagnois as soon as possible and then apply for gaurdianship if you beileve his mental capacity and responsibily levels are that of a 14 year old. In the end, it matters not if he is on your insurance anymore (and you might be able to keep him on if you have gaurdianship and a diagnosis) if he decides to give you the finger on his health care, he can refuse any treatment you try to get him as an adult. He can do that right now, and there is nothing you could do about it. Young adults with mental illnesses, especially mood disorders, are known to do just that very frequently, so you will want to protect him as soon as you can.
We are in this same boat, but thankfully, our soon to be 18 year old has a diagnosis and sees a very good psychatrist who can see her when ever she needs him, but we pay out of pocket even though we have insurance for the privalage of having proper treatment in a timley manner. We should have gaurdianship before her 18th birthday. I would consider it if I were you. It took years of trial and error to find the right medications for her, so I would find a way to get started as soon as possible.
My last bit of advice is that you put your feet on the floor and not be a victim of your circumstances. The answers are often not fair, or something we don't like, but they are there and you have to go get them.
M.