Thank you all.
Quest has gotten steadily better over the past 24 hours and is back to normal. When I see the vet I hope it is something as simple as medication and not a brain tumor like my Patch who had similar symptoms. Losing Quest will be very hard on me. He and I had an instant bond the minute I picked him up. I've never had that with any animal and that bond has only grown stronger. I'll enjoy the time I have with him, whether for a few hours, days, months or years.