I normally go to sleep without any trouble too, but if I have trouble I take 500mg of Calcium OR the amino acid GABA OR the herb Valarian Root OR melatonin.
I have done around 20 some flushes over the last 7 years, but am useing Grape bitters now. They help digestion and clean the liver in 7 days. A squirt in the back of the mouth twice a day, (hitting the vagus nerve, causing the body to create bile) 1/2 hour before meals does it. (Drink a lot of water) You can read about it in the Truth in Medicine forum here at Curezone.
If you are going to flush you may want to try this as it is easier on the system than using Epsom Salts and this one uses very little oil. This is the one I have used.