I have been experiencing stomach pain, nausea, and indigestion since aprox. 7am Sunday morning. I have felt feverish, but no fever. That lasted till about Monday morning, and I felt fine Monday afternoon, then I was back in bed on Tuesday. I felt very weak about 11AM Tuesday, I could not stand or walk, this lasted till this morning. my body still aches from time to time, unpredictable pain in stomach. I do have a stomach disorder, but it's never exceeded a few days at most, and it usually passes through stool.

I don't believe this is the flu since none of my family members have caught it, and I have a normal temp. What could this be?