Yes that is no fun.
I would make sure that your bowels are pretty clean before you start. So it will be faster for the toxins to get out of your body.
Also use the epsom salt. I don't know which flush you are doing.
And I would do a colonic
within 2 days afterwards. (Or colema or several enema's).
It is difficult now but in the long run it will help you feel better.