My cat hasn't been able to keep food down for about 4 days. The first couple of days he would eat a bit, but now he doesn't even touch his food. I've tried all sorts of different kinds of food, but he just won't eat. He also wakes me up at night with these small meows before he throws up. He does this every night. During the day he hides and sleeps, and his stomach makes gurgling noises. he will drink water though, and does urinate. The vet said he should be okay but he just seems to be getting worse. I'm so scared for him and I have no idea what to do.