What Causes Elevated Liver Enzymes?

My liver enzymes are elevated. I have been taking 200 mg. Diflucan since the end of November. My first blood test was fine. I also take oil of oregano P73 often when feel like I am getting sick. I have CFS. In your opinion is it the Diflucan or the oregano? I have also had swallowing problems, indigestion, etc. the last few months and now I am thinking it is related to the liver. So, which do you think is the cause the Diflucan or the oregano.