Good Morning and Welcome to HealingWell,
I do not have any info re HRT and GERD but it is certainly something another member may have input re.
As far as the stomach bug, IMHO, Yes, any sickness in a refluxer can cause a flare up.
I hope you stick with us and that your wife finds something to help her with her reflux.
~~Kitt~~Moderator: Anxiety, Osteoarthritis,
GERD/Heartburn and Heart/Cardiovascular Disease. www.healingwell.com"The road of life twists and turns and no two directions are ever the same. Yet our lessons come from the journey, not the destination."