Karen, it could just be stress, but I think you should make an appt. with your doctor's office to have blood work done and perhaps a scan of your liver. Surgery also takes a lot out of a person. I had a hip revision on Aug. 12th and my energy level is about zero right now. Since I'm only 50% weight bearing until the 23rd, everything takes such a major effort. I have been sleeping a lot more than usual, although I'm healing well.
I certainly know how it is to "look fine" and feel lousy. People that don't have liver disease just can't comprehend it. Everyone here knows how you feel.
Do be aware that blood work does not always tell the full story, which is why I also suggested a scan (with contrast.) Please get tested and relieve yourself of the anxiety of not knowing.