My cat won't eat or drink, and she wants to lie on a cool floor. I tried feeding her by hand, but she won't eat. I think she has gotten into something toxic when she was outside. Yesterday she threw up a foamy substance. I read to make bed and they like to be kept warm, but when I put her on a pillow blanket, she went back to the cool floor in front of th kitchen sink. I can't get to the vet until Monday. What do I do?