Momo has this problem. One time, he had my long hair stuck in his mouth & he made this noise until I pulled it out! I avoid giving him any fuzzy toys & always wash his toy balls bc it gets dirty w/dust & hair (bc he likes to roll it under the sofa or bed & bark until I fetch it for him lolll)
. I also have to keep our floors clean bc he's a yorkie roomba.
What seems to help or stop him from reverse sneezing, I hold his nose down toward his chest (this opens their air way).
Is he drinking out of a bowl? Maybe a bottle would be better?
If he's been doing it on & off for hrs & not being himself, I would be kinda concerned that it might be something other than reverse sneezing...maybe a visit to the vet is in order. Hope he'll feel better soon!