I am 27 years old and have been having severe upper left stomache pain, almost under my ribs with sever heartburn. It feels as if my stomache is being ripped out and sometimes as if I am having a heart attack. I can barely eat anything without pain. Stomach acid is also a major issue with this. I have been on prevacid and after about 6weeks felt better. Now not so much. I have also had an endoscopy, hida scan and so on with no luck... Any suggestions??? TY