It was never 'fun' for me right from the beginning...I was always pretty much suffering for a week....but then sometimes I felt good almost right away too.
Every detox was different for me, and every detox differs from person to person too I think.
I know what you're asking, but there's no guarantees 'this will happen at this time' etc...if this is your way to do it, you just gotta start the thing, and go with it, Pearz, I think.
As always - one last disclaimer - if you get concerned call a Dr or the ER., but I wish you well
D