Stomach burning/pain after eating anything.?

im 14, female. my stomach burns when i eat anything. now its getting worse and it even hurts when i drink water. i have the pain when i eat, but i dont allways have diareha. when i do have diareha, it burns and its watery and a lightish brown/yellow. ive been to the doctor and they told me to make an app to the gastrointestologist.i did but the app is in march! should i go to the hospital? cause its feeling worse and worse. (its not appendicides because 3 years ago i had the same pain and they thought it was appendicitis so they took it out and it was fine.. and i continue having these pains more and more) :l