Please list everything you did on the day of the actual flush - it is hard to understand what could have gone wrong since you listed some things you did during the prior weeks leading up to the flush but then just said "went for it" on the day of...
Normally first time flushers will start unloading their bowels pretty well after the 2nd Epsom Salt mix in the evening. The magnesium has a lot of toxic build up to work on in these first timers.