You both need to get a complete workup by a bariatric specialist immediately. I'm more than 14 years out and only dumped once, in the first year, and that was after eating something guaranteed to make me dump. Don't take omeprezole (prilosec) or ondansetran (zofran) long-term, or at all if you can avoid it. These two meds have been linked in longterm clinical studies to dementia. I've posted a couple of times about it.
If you have nausea after surgery, look into naturopathic solutions, such as drinking pure aloe vera gel.
In general, ask about EVERY medication available to enhance the post-op experience. The fact is, you don't need them. Healing will happen without any assistance, and you're better off experimenting with foods and liquids you can tolerate until you get to a normal solids diet.
Look, as obese people we are victimized, ostracized, ignored, lied to, taken advantage of by corporations who knew we were desperate for any cure that didn't involve eating less food. We know surgery works, so after surgery, use your nutritionists' suggestions to design a food plan that will carry you through healing.
IMO.