It's been 3 days and i have a gastro virus with server diarreoh and pains in tummy no vomiting what can i do to ease this contracting wave pain?

R U sure its a bug?: The GI tract has a very limited # of symptoms to signal its distress--nausea/vomiting, diarrhea/constipation, bloating, pain, fullness, bleeding, etc. As you know, many of these characterize ibs, but are also seen with inflammatory, infectious, ischemic, malabsorptive, and functional disorders. Directed lab work, imaging, biopsies, stool studies are appropriate if symptoms persist as described.