Help Moo Cow

Our sweet cat was her usually self only 5 days ago. Then she started getting sick. It started with coughing. We thought maybe she had a hairball. But after 24 hours, she still hadn't coughed anything up. Then she stopped coming to us to be pet. She's such a lovebug and is always wanting to be pet. She stopped eating and drinking. She started hiding under beds, something she never does. Then she just started laying on the floor, no life in her eyes, not even moving when we would come near her. We took her to the vet, but because diagnostic testing, aka xray and blood work cost so much, we couldn't afford to do it. We opted to rehydrate her and get a antibiotic cocktail in hopes that would make her better. She desperately needs an xray and blood work. Help us make our kitty better.