@jessiccab, Welcome to Mayo Connect. I did not have Fatty Liver disease, but another liver disease. I hope that my experience will prove helpful to you as you begin to navigate a new diagnosis. It must be frightening for you. I know it was for me.

How long ago did you receive this diagnosis? The swelling and the elevated white blood count could be sign of an infection. When I had liver disease, I frequently had infections along with my abdominal swelling (ascites - fluid retention) and needed antibiotics. Is it possible that your weight gain is due to possible abdominal fluid retention?
For liver disease, you will want to be treated by a Gastroenterologist. Are you being treated by your Primary Care doctor or a Gastroenterologist?

I have added a link to information about Nonalcoholic Fatty Liver Disease. I think it will give you some information so that you can have a meaningful conversation with your doctor.
https://www.mayoclinic.org/diseases-conditions/nonalcoholic-fatty-liver-disease/symptoms-causes/