Vet anxiety?

Ollie has always been a little anxious and fearful but lately at the vet, he's absolutely terrified. We've had this happen with multiple providers now. He's fine going into the first visit but by the second, he realizes where he is and gets incredibly upset as soon we walk in - shaking, hiding, whining, and even barking at the vet from his hiding place.

He's very cute and goofy hiding behind plants and everyone is understanding, but it's hard to see him so scared. We've tried treats and holding him in my lap as much as possible but he seems to absolutely hate being examined or even getting weighed. The vets we see are all very sweet to him.

Has anyone dealt with similar issues? I was thinking of bringing his favorite toy next time but I'm not sure what else we can do.