My cat has NEVER gotten sick and hasn't ever been needing to go to the vet!?

I think it's random... My cat is not in brindleton bay but just got sick, the poor thing was coughing and coughing, had swamp breath. I kept hearing a sad noise and I went to my cat instinctively, and I saw her collapsing on the floor, poor kitty.
Have you heard that sad'ish' noise followed by your pet collapsing? That means the pet is sick. You could've just missed it. God knows I did too