help!

ka

I'm 5 weeks and believe I caught a virus from my preschool. I've have diarrhea and vomiting since 5 this morning. I try to drink sips of water and ginger ale but nothing is staying down. I also tried saltine crackers but my mouth is so dry it's not working. I left a message with my OB but they haven't called back. anyone have advice on what can help? I know I cant get dehydrated but I don't know how to keep anything down