Have you been to a Functional Medicine Dr yet? Usually insurance doesn't cover for it and it is out of pocket. I am seeing one right now and my Dr. did a ton of tests and they look at different things than regular/specialists check regularly for in labs/scans/X-rays/Ct's, MRI's. If you have a credit card or a family member that could help you out, I would highly recommend you see a Functional Medicine Dr. They will do allergy food testing on you, do a whole battery of labs on you and take much more time to spend with you going over what you eat, meds, medical history, etc..... Have you been tested for foods? If not, try keeping a food journal and seeing if food is the problem. I have nausea and I have lost weight too. Awhile back, I got told by a Psychiatrist via a swab test thru the mouth that I had a folic acid deficiency and that I needed to supplement my body. She told me to take L-Methyl Folate. I went off of my L-Methyl Folate and I noticed a huge difference, I lost 25 lbs, I started having nausea, problems with eating meat, especially fatty meats and fatigue and not hungry and feeling full after eating very little. I suspected I had problems with my liver, liver CT scan came back normal, however it did say that I have the possiblility of having fatty liver disease. Have you had any tests done on your liver? If your Dr. isn't helping, I would be switching Dr's or hospitals if you are able to do that. They have medical journals, where you can do tracking and writing down your symptoms, food journals and medical journals, you might check into something like that. I have one and I love it! I will keep you in my prayers and hope you feel better soon. Keep us updated on any updates with you!