Going through S4aQ you will be tired the first week.  Your brain is healing, and there is an internal battle going on.  The drinking program is going to pull out all the stops to try to complete the mission of getting the drink!  But that fog is going to clear.    Pain with a payoff is life changing.  Most will quit when it becomes challenging, but the power of the program lies in coming out the other end.  You can do it!