Functional Nausea

Hi I’m not sure if anyone suffers from Functional Nausea. Recently, I had an appt with a gastroenterologist. Her diagnosis is Functional Nausea. I’ve been scoped in the past. I’ve been battling this disorder for a few years. I battle it everyday with a loss of appetite plus heat in my esophagus. Even though, I’m nauseated, I am hungry at the same time. I’ve been on antidepressants in the past. Really, not taking too many meds. I’m on a ppi, blood pressure meds, amitriptyline and lorazepam. No anti nausea meds help, nor ginger and peppermint. I’ve been on bland foods also. I see a therapist. I’ve researched vagus nerve devices might help. My therapist wanted me to discuss this with my pcp. These devices are very expensive. Not sure if Medicare would pay for it. I’ve been working with my therapist to manage my stress, depression and anxiety. Has anyone dealt with Functional Nausea? Has anyone used a vagus nerve device for nausea? If so, did it help? Thank you for any suggestions and info regarding this.
Flo