Hey, Welcome back! I have wondered where you went to. You know that you are seeing some Neanderthals, don't you? I have some reading for you to do. The article you might want to print out and give to your doctors. The NP isn't worth the time of day, though, on the off chance that she is educable, a copy to her might not hurt.
The first is a peer-reviewed article from the Consortium of MS Clinics. It is an eloquent piece explaining that up to 40% of all people with MS are "never without pain" and that 2/3 of them have disease-related pain at some point. Any doctor that denies pain in MS is a coward that doesn't want to get into trying to treat it!
We have had two threads recently about mental deficiencies in doctors:
and about the common myths that ignorant or poorly educated doctors hold: Lies My Neurologist Told ME.
I think you need to find new doctors - despite already being told you doctor-shop. Yes, doctor shop until you find ones that LISTEN to you, LOOK at you and your info and then THINK with grown-up brains about the problems.
A complaint to the Licensing Board of your state is appropriate here in stating that you are unable to get treatment for pain, being told in error that there is no pain in MS. Complain that these doctors are not educated in the diseases that they claim to be able to treat. Here is the site for SC.
As you switch doctors lead with the statement that prior doctors had been ignorant about MS and would not consider that pain is a part of MS. If necessary, obtain a psych eval for evidence that you are not a "crock." Seek care from a pain management clinic that deals with "pain" not just managing pain and addiction.
Definitely copy this article for your PCP as explanation for why you are changing. Be upfront about pain and the need to treat it. Believe me, many people here on the forum are on and need various forms of narcotics.
These are just some ideas. I am so sorry you have to go through this!