I am so sorry to hear about this. It definitely sounds like your son's psychiatrist that evaluated him, was not very well qualified and did
not appear apt to help him unfortunately. Most likely you will not get in trouble for what he said, especially if he recants too. Your doctor knows your situation and knows that you need the medication, so you should be fine there. Well I do remember when we talked about your son the last time we chatted and he was open to therapy and treatment, so that is a positive aspect and it is unfortunate that this psychiatrist may have turned him off of that. So I would suggest going to a Psychologist, someone with Ph.D. or Psy.D. by their name, as these mental health professionals are best to do evaluations, and if he wants a thorough evaluation with objective evidence, then he would need an Assessment Psychologist or one that specializes in Testing and Evaluation. If you like I can find a few in your area, I would just need your zip code. These types of psychologists will give the best kind of evaluation for your son to narrow down his diagnosis appropriately and then your son can approach psychological/therapy treatment from there.
If a psychiatrist will not help at this time, I do recommend that your son needs medication, so he can go to general practitioner and ask for an antidepressant. I would recommend escitalopram at 10-20mg because this is a very effective SSRI antidepressant that works fast and has less side effects too.
I think this would be the best approach for your son at this time. I am so sorry that you are having these issues with mental health professionals currently, but I agree that your son needs to get a good firm diagnosis from objective evidence through the use of psychological assessments, then he can approach treatment which should include therapy and medication. I hope this helps you and gives you guidance. If you have any other questions or concerns please feel free to contact me at anytime