Just thought I'd let you know that when I was taking Milk Thistle for my liver last Summer, the 'blurb' that came in the package spoke about the fact that endometriosis is involved with a congested liver so a good cleansing may really help you there.
Also, about four years ago, I was in a retail job with different shifts, but managed to do a 21-day fast on the Master Cleanse which is with lemon juice, etc. It was not difficult. In fact, it was quite great not to have to worry about food. My colleagues could not believe that I was not eating. I just kept some of the mixture available at all times so that I could have a sip to perk me up.