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Hi this is Dr. Elaine, and I'll try to help.
How long ago did this start?
Was she fine one minute, then like you describe?
Does she go outside?
Any flea products used on/around her?
It sounds like she may have had a seizure of some sort.
In kittens with neurologic symptoms of sudden onset, I think about a) trauma
b)viral (like "dry" FIP--usually not transmitted to other cats, but by mother to offspring), parasitic ( like toxoplasmosis).
These things can all be checked/tested for.
A 'typical' seizure (altho nothing is very typical in cats when it comes to seizures...) would have her getting progressively more able to stand, walk about over 30min-hour.
If it has been this long and she is still very wobbly, I would either let her eat something or rub Karo syrup on her gums (for dextrose sugar) and call the emerg clinic.
FIP is a corona virus that infects cats via their moms (i.e. "vertical transmission"). It can take "dry" or "wet" forms.
Check this site for more info: http://www.petplace.com/search.aspx?c=0&q=FIP&x=26&y=9
Parasites (especially toxo) can enter the brain and cause neurologic signs, usually progressive until/unless treated. Aberrant (not typical) "migration" of certain stages of other parasite larvae (like 'worms') can also do this.