Hello Linda @lindacw1, Welcome to Connect. I have idiopathic small fiber PN but am one of the fortunate ones who only has the numbness and no pain or burning. I'm sorry to hear the IVIG treatment caused problems and didn't help with your symptoms. While you wait for others with similar experience to respond and you mentioned also wanting to see a pain medicine doctor, I thought you might find the following discussion helpful:

--- Mayo Clinic Pain Rehab Center (PRC) - What’s Your Experience?: https://connect.mayoclinic.org/discussion/mayo-clinic-prc-whats-your-experience/

If you would like get a second opinion from Mayo Clinic, you can find the contact information for
the Minnesota, Arizona and Florida campuses here http://mayocl.in/1mtmR63.