no one but a vet can tell you what's wrong with your cat. even if a vet was posting on here it wouldn't be professional to diagnose your kitty. it sounds like you cat needs blood work and medical attention. i'm sorry that this is stressful for you but i'm afraid it wouldn't be fair on the cat or you for anyone on the internet to give you advice about what's wrong with your kitty. speak to your vets about your concerns and financial situation and they should be happy to discuss your options accordingly. please don't deprive your kitty veterinary attention because of someones guess or assumption of what's wrong with your cat on the internet. please get the blood work done. best of luck.