Hi . It is terrible that your issues were seemingly dismissed cavalierly. Too often we hear of RA patients and autoimmune patients in general being told some symptom(s) are just in their head - you deserve to have your issues heard and taken seriously. I say this not to diminish potential psychological impacts of living with a chronic conditions like RA, but simply that, given the nature of autoimmune conditions, potential physical causes of new symptoms should be examined first before being dismissed.
While rare, there are potential autoimmune related causes of facial numbness, such as trigeminal sensory neuropathy (see: https://academic.oup.com/rheumatology/article-abstract/40/7/832/1787988) or other forms of neuropathy (see: https://www.healthline.com/health/tingling-in-face) or allergies to medications/treatments. I am not, of course, saying that any of these are the cause of your numbness - only a doctor can do the proper diagnostics, but rather to illustrate that there are possibilities, including RA related ones that could be investigated.
Have you had a chance to speak to your rheumatologist about your experience with the neurologist? Maybe they will have additional avenues of investigation or could suggest a different specialist. Hoping you can gets some answers and relief soon. Please feel free, if you like, to keep us posted on how things are going and to ask additional questions. Best, Richard (Team Member)