Hello iamme.
I'm starting (again) today. I promise that you are not alone in how you are feeling. I tried telling my wife once or twice but the response was "I don't want you to be stressed or upset. You should drink". Like you, I'm the volunteer who helps everyone, earns the money etc etc.
If it's any consolation, I'm actually impressed that you managed to vomit on a cat. Those things move like lightning (but I love them).
Go to a doctor. You won't be the first person they've spoken to about this issue.
Good luck.