Have you asked your GI if he can prescribe Zofran? That helps me a lot with nausea. The pantoprazole didn't really help me with nausea or acid reflux, neither did famotidine. Prescription Prilosec helped with acid reflux but not nausea. I finally did get Zofran but from my gyno telling him my hormones & cycle make me nauseous (which it does worse than normal) but that is the one thing that really helped with my nausea. Though maybe it plus the Prilosec helped, I'm not sure. Still, when my cycle gets to me, only the Zofran helps.
But of course, I don't have gallbladder issues (at least I don't think so).
I did have a perforated ulcer and still have a hiatal hernia. I think the hiatal hernia is getting worse though because sometimes I have trouble swallowing and

I see my GI next week again and I know he is going to want a colonoscopy (due to my age, not any problems I'm having) but maybe an endoscopy too because of the hiatal hernia.