Elevated serum bilirubin. Of action?

After undergoing a regular full body checkup I found that I have elevated LFT with SGOT - 230 and SGPT - 329. Total serum bilirubin was 2. The doctor prescribed me UDCA 300. After two months my SGOT and SGPT have reduced to a normal level of 42 and 24 respectively but my serum bilirubin is still high at 2.1. The ultrasound of the abdomen says "Liver size is normal and Parenchyma appeared inhomogeneous and hypoechogenic echotexture seen. Intraheptic biliary channels are not dialated. No focal lesion seen l. No collateral at porta hepartis." Everything else is normal in USG. I don't have any Symptoms, fever or weakness. What may be the reason of elevated LFT? Is the findings of USG is something to worry about. What should be my future course of action? Hepatitis B, C and sickling tested negative.