Pachymeningitis anyone??

I am 71 & was diagnosed with idiopathic pachymeningitis a year ago. I began to lose the hearing in my left ear. ENT sent me for a MRI. Then sent to a neurologist. Confirmed pachymeningitis. Multiple MRIs. Lumbar puncture showed high protein level in spinal fluid. Sent to infectious disease specialist who ran all sorts of bloodwork. No obvious cause. Have developed vertigo, balance issues & some issues with my gait. My neurologist just retired. A frightening, rare, lonely disease. Not knowing what to expect.