Anyone with a mystery stomach bug?

Has anyone else had a non specific stomach bug? Kid 1 had a few hours of vomiting about 4 weeks ago, followed closely by kid 2 having intense nausea (but no vomiting). Both still have on and off sensitive stomach, mostly complaining of nausea when they eat anything oily or fatty.

Both kids have recovered from the initial bug but they get on and off nausea still, and it’s been over 4 weeks :/

by melthebell83