Kitten regurgitation

Hi so my kitten 3.5 months old just regurgitation all what he ate for today he looks normal he still so energetic and playful as always, but now he’s so so hungry he does desperately trying to eat my foot .

So the cause might be that im changing his food company or bc my family gave him raw meat. And he drinks less water these days bc of winter. And he always eat sooo fast even tho he’s an only cat no ones stealing his food.

I’m going to the vet tomorrow, just in case , but should I stop feeding him? And if there’s any other advice i should know about I would be thankful.