It might be worth consulting a skilled chiropractor. All kinds of things can get subluxed slightly and never show on imaging. A practitioner who is certified in ART (active release therapy) may also be able to figure out any soft tissue impingement from swelling, injury, etc.

You could also try a Physical Medicine and Rehabilitation doctor. Neurology is great but not always looking as much at biomechanical issues on their radar.

I hope you find relief soon!