High gamma levels in liver

I was in hospital a two weeks ago with high abdominal pain (where the stomach sits) after multiple tests nothing was really found however they found my liver function test was high and my gamma levels were high. I was basically accused of being an alcoholic which really upset me. I'm an eighteen year old, I drink no more than any other eighteen year old (probably less, the most I have is three glasses of wine once a month on pay day) and it's really getting to me as i'm being told to watch my intake now. Has anyone else had high gamma liver results for another reason? Because I'm feeling like this diagnosis is totally out of order:(