Your wife seems to be having a more serious problem apart from the vertigo
. Please get her CT scan or MRI of the brain done to rule out any organic brain damage
It is not a good sign for someone to fall dizzy and lose consciousness for long hours. It is better if a Neurologist
evaluates her as well. An EEG of the brain may also be required.
Please follow my suggestions and move ahead accordingly. Do not 'wait and watch' now.
I hope this helps you. I wish your wife a quick recovery.