my symptoms were: extreme vomiting diareah smelly gas/burps couldnt move or if I did I vomited
I have always had a sore stomach for as long as I can remember, but my mom always said it was "monday morning blues" but we went to the doctor, they never thought anything of "sore tummys" either, so after several trips to the doctors they gave me a blood test, I had it, not sure how long for but diagnosed when I was about 12.