stomach problems

Okay, I'm posting this so I can maybe relate to someone on here with the same problems as me. Ever since I was little, I always got sick. I had mono when I was in kindergarten, threw up almost every night for really no reason... and when I went to the doctor, they only told me I had GURD (basically a lot of stomach acid). I started feeling better and now fast forward to 17 years. I've been to the ER twice... they did a scope on me and hardly saw anything. Every time I go to the doctor they make me feel so stupid. They basically tell me to stop stressing out and blah blah blah. GUYS! I JUST WANT TO KNOW WHATS WRONG WITH ME. It's been so bad lately I've missed way to many days of school. Almost every night I wake up with weird freaky dreams and I wake up in a panic... then my stomach starts to hurt so bad And I usually throw up. This happenes so often! It's starting to take a toll on me. I'm started to feel depressed, I never want to leave my bed, I go to school and stress hoping I won't throw up at school, all I want to do is sleep, I don't want to eat ANYTHING but I force myself too or else I won't feel good, I'm always tired and cranky. I just don't understand what's happening. All I want to do is go to the doctor and get them to tell me what's happening to me, but when I do I always leave with no answer other then my stomach acid. Every days a bad day for me. I physically and mentally can't do it anymore. I just want to be a normal 17 year old and go out and have fun with friends and be a better girl friend to my amazing boyfriend. I just don't know what's wrong with me😭