A Neuro will not help much. An MRI will not likely show anything. There is a moving x-ray that can detect loose ligaments at C-1 to occiput, the area the HANS is designed to protect. But, the HANS is not perfect. Your head and neck still get jerked around.

A Physical Therapist with good vestibular skills will be good and likely easier to get in with than a vestibular specialist. Not all PTs are equally skilled. Same goes for chiros. Some can help with subtle neck injuries. others make things worse.

Just extending your head/neck can be part of the issue. Icing your neck can help. Read the vitamins sticky at the top. It has a recipe for a crushable ice packs.