Buttons :(

My little Buttons has slept ALL day in a corner of my bedroom. A couple times we have taken her to the food and water, but she just heads back to the bedroom. She hasn't played all day. She doesn't even open her eyes the whole way. I called the vet at 4:15 and took her in. She has a slight fever. The vet couldn't find any definitive sign of infection, but said Buttons is getting a really big tooth. This could all be teething - like a baby. He gave her a shot of antibiotic and something else (I forget). I have liquid antibiotic to give her for a couple days. We'll see if she is better in a couple days. Poor baby. :(