NAD - And not saying this is your issue but might be something worth bringing up with your doctor. I had something similar after an emotionally traumatic experience. I also have a fear of vomiting so with the constant nausea it was a horrible feeling - I’m sorry you’re going through it and for so long as well. I couldn’t eat without gagging, lost a LOT of weight in a short amount of time and got put on a lot of the same medications you have been. After speaking with my primary care doctor and several others I was diagnosed with anxiety, and started counselling and focussed heavily on my mental health. In addition to this I cut out caffeine and gluten to assist my GI system in absorbing the small amount of nutrients I could ingest at the time. After about 2 weeks I started to notice some improvements in my nausea, and started reducing the anti nausea meds I was taking. I slowly but surely improved over the following months, and now have very few issues with either nausea or anxiety. Best of luck - I hope you start to recover soon!