Are you sure you want to hear all the problems you can get after a flush? :)
In my case (everybody is different), when I started out, I had for up to 6 weeks the feeling of a sinus infection. Painful, my problems are always in my head (btw I started in February).
Now-a-days after the flush I am sluggish for up to a week , flue like feeling.
Now the good news: I think I have still my 2.5cm gallstone, what is fine with me, because he is asleep and he does not give me any trouble. I just keep flushing. Fil calls it a silent stone and that's what feels like.
Good news that I did not expect: NO allergies anymore, lost some weight because of eating better, stopped smoking..lost interest and decided to give it an extra push.
Drink enough disstilled water, and I never drink pepsi etc. anymore. Even the dentist noticed, my teeth never looked so good before.