hello, I had symptoms that seemed like the stomach virus, but my back was hurting too, I had nausea, diarrhea, fatigue, exhaustion while doing daily activities, no energy , and muscle aches, I also urinate frequently but I have no fever just a bothersome feeling in my back, not really pain, just this feel of kind of heaviness and achy all I feel like doing is sleep, I looked on line and it seems like I could have a kidney infection. im not sure.