In your case, can go see chiropractor to help control the spinal & problem, which can helps the breathing difficulties, headache, dizziness, neck & back pain, hypersensitivity etc, but although can't cure the Chiari malformation, but can help you to get better performance on daily living
we have to see you in person, do a physical examination, perform some test to see what's the underlying problem, but can be link to misalignment of the spine & hip after your fracture injury