I hope you can stop taking the Tylenol. It is not good for your liver at all! I took many hydro's that have a lot of Tylenol in them. I damaged my liver. Liver disease is not something you want believe me! A endoscopy will not check your liver. Liver disease can be a silent killer. But a blood test can tell if your liver is having problems then they do a ultra sound and also a liver biopsy. Please stop taking the Tylenol! It will kill you!