How Much Is TOO Much to Spend at the Veterinarian?

I have a kitty that is about 2-3 years old ... I don't know her exact age because I got her from a co-worker whose 2 dogs and cat bullied her. A couple of days ago, I noticed Chee Bee acting strange. Strange like lying under the nightstand, in a corner, under the center of the bed when usually she lays on the bed or inside the box spring lining like a hammock where she tore the lining. She also hadn't eaten or drank anything for at least 24 hours. ...more
What a tough dilemna....I'm making a mental note to check on insurance.more