What could be wrong with my liver?

I am 18 years old. I went to the doctor for a checkup. Everything was going fine until he made me lay down on the table face up and he started feeling my stomach. He told me that my liver was big. He told me to go to a nearby hospital to get it looked at sometime. I am waiting for my parents to get their new insurance before I do this. I had a small bottle of Coke before I went to the appointment, so I was a little bit gassy. I was also on my period, so I was a little bloated. I didn't think to tell the doctor that at the time because I was too nervous and worried. What could be wrong with my liver? I quit drinking carbonated beverages, but is there anything I could do or eat to help my liver?