Diarrhea, upset stomach, nausea....need relief ASAP?

I've had an upset stomach, frequent diarrhea, and nausea since about 3:30 this morning. Around 1:00 this afternoon I felt a little better. I wasn't running to the bathroom as much. A little later on during the day I regained my appetite and was able to drink a little flat warm ginger ale and some chicken rice soup. After taking a nap, I ate some saltine crackers and drank water and felt great for 3-4 hours. Around 9 p.m. all the horrible symptoms returned. I lost my appetite and anytime I drank water, I would have a watery bowel movement. I have really bad nausea but I haven't thrown up. I can't lay down or move too much without the nausea getting worse. Any tips or ideas so I can get some rest and make it through the night until I can see a doctor. I didn't get any sleep last night and had a few naps during today but I need some sort of relief ASAP so I can feel better and go to sleep.

Thanks!