fatty liver,pain on right side under ribs

I am a 25year old female,
I have been drinking since I was 16 but ive been drinking to excess for the last 6 years. I eat very healthly, excercise and drink plenty of water but I have been having a annoying pain on my right hand side under my ribs from the front to the back.Its not really painful, its mostly always lingering pain but some days its more painful than others. I have told my GP and they took blood tests but the all came back fine. They also did a scan as they thought it might be gall stones, they couldnt see any gall stones and they said my liver looked normal. I am wondering what it could be then, I guess it has something to do with my drinking but im not sure. I have been reading what others have said about the same pain but most mention having a fatty liver caused by drinking alcohol -would the doctor that scanned me not have seen if my liver had excess fat? I have had the pain for probibly about 2 years, but the doctors dont seem to be very concerned. if it continues do i ask to get the same tests done again?I dont want to seem like im wasting the doctors time again especially if all the tests come back fine again? But I also wouldnt want to ignore it because they say im fine but then find out i have done bad damage to my liver, What do you sugest?