Suggest Treatment For Excessive Nausea With Stomach And Chest Cramps

I can not hold food down, it s literally gone on for well over a year, I ve been to so many doctors and have not come up with a solution or a diagnosis, I have had my gall bladder taken out didn t help, have taken every type of stomach or germ medication nothing helps, I ve had every tooth in my mouth get eaten away from the constant vomiting and acid, I have denture see now, I can t leave my house without a puke bag always next to me it will hit me out of no where mainly about 30 minutes after I eat . Sometimes just because I have this tight like muscle around my sternum area and it tightens up and it s so painful when I get that tight squeezing feeling in my chest I know I m going to get sick. What is your thoughts