Sounds like you do need a new PCP for sure.
One that will help you and refer you out to the correct specialists.

Don't stick with one that will not help you to feel better.

Perhaps an autoimmune specialist would be good to look into also.
I don't have any specific suggestions for your location though.

Does your insurance carrier have a website - most will have a nurse care line or even a dr search tool - so you know the ones you find will be covered by the ins network.