Medical bills for my cat

Over the last couple days my cat has stopped eating, drinking, and moving. This morning I found blood on him and in the laundry room where he slept. The doctors told me that he had a very bad urinary blockage and that his kidneys could be failing. I work 10 hours a week at old navy which is not enough to pay for $2200 in medical bills (possibly more). The minimum it costs right now is $1600 until I find out what exactly is wrong and how to fix it. Right now they're keeping him at an animal hospital for two days to flush out the blood in his bladder and get him hydrated so they can figure out what the cause is and how to treat it. I've had him for three years and he's the light of my life so I'd like to do everything I can to get him back to health but I don't have $2200+. I'd be so grateful for any kind of help because I can't lose him. Thanks.