Why is my puppy acting strange?

I have a 3 month maltese. I took him to the groomer on friday and he came back tired and lazy. He wouldn't eat and he kept whining. I thought that the groomer just tired him out because this has happened before. But yesterday it was still going on. I shoved food down his throat followed by water. Next, I bought a puppy nursing bottle and I fed him diluted evaporated milk. Also I gave him Nuti-Stat to bring his energy up. I left him at home for a little bit and when I returned he had threw up what looked to be the Nutri-Stat and some white slimy stuff. I picked him up and he threw up on me. Next he started opening and closing his mouth several times. I thought it was a seizure but I am not sure. Later last night, he was pacing and walking into closed corners and trying to get though. He would start whimpering if he couldn't get into that corner. He was very clumsy and slipping and he would carelessly walk through his water and food. I set up a blanket in a corner and he slept there the whole night. I went to sleep around 3:45 and my mom said she woke up at 4:00 am and he had moved to another spot and BM'd and then moved back to his blanket. This morning he cant walk and he is very sleepy. I fed him by shoving food down followed by alot of water to prevent dehydration. He drinks and swallows but won't eat for himself. He was perfectly happy and barking and playful before I took him to the groomer. He was even playful for a little while when he came back from the groomer then I guess he just collapsed and fell asleep. This is not the 1st time that he has been sick but however this is the longest that he's been sick and the 1st time that he's thrown up. Please Help!