Don't Know What To Do Now.......

Hi, i am 45 yr old female who has been sick most of my adult life with ibs/d....supposedly anyway. I have had every test imaginable done, all come up negative. I have nausea, feelings of fullness, massive amounts of diareaha, fatigue, cold chills, aches and pains all over. I have been to numerous doctors, had all the tests, even was just hospitalized for 3 days due to such low potassium. I think i am going insane actually. I have very bad anxiety from all of this. I am also suffering with emetophobia, the fear of vomitting....of which i have only done twice in my life that i remember. I've had this since kindergarten. I just don't know what to do. I take phenergan and zofran and prilosec. I have been dealing with these symptoms since the latter part of high school, still with no answers. Has anyone had anything similar, and found the answer. I feel like i'm in a whirlwind with nowhere else to turn. I cannot even eat a meal anymore. I nibble on this or that, b/c i get so full, or have diareaha, or feel to sick to eat. I lost some weight, but not a great deal. I feel tired, and worn out all the time. I just don't know what is wrong with me and i'm so tired of dealing with this.