For the past few months I have been having some stomach problems. I always feel full, i sometimes feel like im going to throw up. Awhile ago, I went to my doctor and told him my symptoms. He ordered some tests ( blood, ultra sound, and the test where you drink the glow view i believe its called) all came back with nothing. The symptoms stopped and than came back after a short time period. What could this be? I dont know what to do. Im an 18 year old male thats always been healthy!