We have a Chiari forum here. So you can take a look.

I had the impression that headaches, and vomiting were signs of this too.

But you know there is another cause of incontinence...it is called normal pressure hydrocephalus. NPH .. I would think your neuro would have thought of that, but it typically happens in older patients. Gait disturbances, dementia-like thinking and incontinence are the signs.

http://www.emedicinehealth.com/norma...article_em.htm

It is possible IF most of your symptoms occurred AFTER the fall that you jarred your spine enough to trap the flow of CNS fluid.

That might suggest Chiari, or NPH or something like that.
The possibilities I gave you are more internal medicine, because neuros often don't consider that ..and only look for neuro things.

Chiari is controversial...I recall when it was fashionable to blame fibromyalgia on Chiari... seems that has waned now and is not done like it was 10 yrs ago.

I don't know much about Chiari. A gal my husband knows at work, had this done when she was in mid 50's...the decompression surgery. She was having headaches, and behaving irrationally. In fact the first surgery didn't work, so she had a second, and now is back at work!