I am so so sorry to hear about Presley.
Working closely with your vet, I hope he finds the
problem.
We had an older poodle mix that developed
epilepsy.
My girl friend use to have an Akita who died 2 yrs ago
at age 11 who suffered from a life of seizures, but
thankfully the seizures were not the worse kind and not
daily.
She had joined a help group with others on the internet
who's dogs suffered from medical problems, where she
got support and a wealth of information.
I will be thinking of your precious baby and hope she
will be all right.