Do you have the option for a second opinion? I would think the vet would take the issue of no eating or drinking very seriously and look for all possible causes, rather than not believing what’s been readily observed. It sounds like she’s unwilling or unable to swallow, and since it happened after the choke, maybe the choke was symptom of her swallowing issues (I’m thinking foreign body or bad tooth, rather than it being the cause of what you’re seeing now.
And it’s way too soon for QOL decisions, IMHO… there has to be an acute reason why this is happening,
In any case, please keep us updated and many jingles for this to resolve quickly!