When my gall bladder dysfunction was finally diagnosed (HIDA scan showing a 13% ejection fraction) 17 years ago, it was after nearly two years of doctors calling it IBS
and/or GERD (they prescribed
Prilosec, Vicodin and mediation). Of course, this prior experience doesn't necessarily mean it's not IBS this time, but I am just a little suspicious of doctors who jump to that the moment the MRI and (Upper) Endoscopy are clear, so I'm pushing to exhaust all alternatives first.