I have a 8 yr. old PomPoo, that has had all her shots, and is a inside dog. About 2 days ago, she acted like she did not feel good. The next day, she acted like she could not bend her head down to the water bowl, so I held it up for her. [still doing that] When I went to pick her up [bc she acted like she could not jump on the couch/bed] she yelped. I gave her 1/2 of a baby asprin this am about 4 hours ago, she seemed to be walking around, I carried her out to use the bathroom she did both. Her nose is wet and cold. She is now drinking, and just eats a little bit of a dog snack. What could be wrong with her??