I usually find that I feel melancholy...ie. in pop culture "depression" in the days following a flush. This is another form of anger turned in on oneself rather that turned outward.
I am very much looking forward to the days when I feel euphoric after a flush...this will signal a release of a lot of old junk held in the liver.
As Serene Tea said, the liver is the repository for the emotions according to Chinese Medicine, and it opens into the eyes...hence the term "the eyes are the window to the soul".
See this as a positive sign...you are on the right path to complete recovery. Don't ignore the feelings, explore them, forgive and release.