tired of constantly feeling sick

Im constantly nauseous, I never feel good, I have really bad anxiety and on top of that I have this phobia. I constantly feel like im on the edge of being sick. Everything I eat hurts my stomach. Ive spent years going to the doctor and getting told im fine. I dont feel fine. Im so tired of it. I try to make life changes that help anxiety and i have my good days but majority just stay bad.