This is Dr. Christian. Welcome to JustAnswer. Is he keeping the water down? Has he had his vaccines and how old was he when he got the last one? Is there any blood in his vomit or diarrhea? How long has he been this way?
Thank you for the information. There are several possible causes for the his symptoms:
The most likely cause is parvo which does require veterinary attention. The options are limited since there are no over the counter medications that can help this situation. I don't recommend giving any more pepto since it has aspirin in it and can actually cause bleeding in the intestines. It is good news that his temperature is normal. The best thing to do is to keep him hydrated so keep giving him small, frequent amounts to minimize stomach upset. Don't worry about food overnight, he'll be fine without it. It is best to have him seen immediately but it that is not possible then first thing in the morning. If you have more questions please let me know.