Need advice after my puppy bit me and the vet yesterday

Hi everyone, I’m feeling pretty shaken after an incident with my 3-month-old puppy yesterday and I wanted to get some perspective.

My puppy has been having frequent vet visits recently for vaccinations and check-ups. Yesterday, during a routine injection, he bit me on my finger and didn’t let go. The vet tried to help and also got bitten. Both bites drew blood, although mine was minor.

Afterwards, the vet reacted by physically restraining my puppy for several minutes, slapping him and scolding him while he was clearly scared and struggling. He even urinated out of fear. I was really shocked by the whole situation.

Since then, I’ve been feeling guilty and unsure about whether my puppy is aggressive or if this was just a reaction to fear and stress. I also feel overwhelmed and unsure how to handle him safely.

My puppy has never shown signs of aggression before, and this was the first time anything like this has happened. I want to understand if this was just a one-time stress reaction, or if it’s indicative of future aggression.

I’m also considering changing veterinarians to someone more gentle and fear-free, and I want to know how to manage my puppy safely in the meantime.

Has anyone experienced something similar? How did you handle it? Any advice is appreciated.