What other cleansing have you done?
What diet changes have you made?
Have you had any tests done to better understand what is causing the fatique?
A clean liver is a good foundation to work from, but Liver Flushing is just one step on the road to regaining true health. Don't feel like you've wasted any effort - your liver is now MUCH more able to handle whatever else needs to be done. Keep looking and keep asking and keep educating yourself.