I didn't do a pre-cleanse prior to my fast. The emotional cleansing happened to me on a 14 day fast (around Day 11). I resolved a lot of issues. I removed some stagnant emptions. I still regret breaking my fast at that time. My body clearly wasn't done re: emotional cleansing. Mistakenly, I ended my fast while being angry (I believe this was part of the "cleansing phase" of an issue) with a person. Had I continued with my fast, my reaction to everything about this person would probably not bother me or they would no longer be a part of my life. I don't know.
I'm going back and forth as to whether I should do another fast next month to pick up where I left off. I am going to do a 40-day in Spring. If I don't fast before then, that should definitely take care of everything.
I think an emotional cleanse is a wonderful thing. I believe it has to happen (regardless of the stage of physical cleansing or method of cleansing).