If you were on treatment at the time of the scope that might have healed things and given the appearance of normal - I.e. The treatment was working?
My first scope was normal - my second 3 years later wasn't, and yet my symptoms were identical both times. Sometimes the findings just don't match the symptoms, and they call it "functiional".
Did you get tested for Helicobacter too?
New stuff: GERD, Recurrent cystitis/Overactive bladder
Lifelong stuff: Food allergies/intolerance, eczema, asthma