Trying the Liver Flush won't hurt. I am just guessing here that the cold feet and hand issue might be a thyroid problem. I have never used activated charcoal but heard a lot good about it. Liver Flush is not a cure by itself and not a quick fix either but it's definitely good to hose out the toxin debris from the dead parasites out of the body.
Have you ever tried gluten free diet? A lot good happened to people just by elimination gluten from their diet.
Itching is just anointing. I know what you're going through. Enema, especially coffee enema done right does wonder. Still not a quick fix.
Good Luck on your endeavor to being whole and healthy.
PS: If in case you consider doing Liver Flush here a link that have the list easy way to do it. http://www.lakechkebede.com/your-body-the-temple-of-god/liver-and-gallbladder...