White in your stool is generally yeast - candida being one of them.
You say: "Clear mucus discharge from anus." It seems like yeast to me.
The good news is you are on the right protocol= antifunagal Bowel Cleanse and the like;
the bad news is it's not enough - Nobody ever got rid of yeast with the protocol alone - The diet is also necessary- basically you want to avoid eating what yeast feeds on (carbs - Sugar - cafeine) so as to starve it otherwise it will win over you-
No coffee - no beer no sugar- believe me at some point you will want to be on the diet due to feeling so bad when you arent - one single beer would give me a hell of a hangover back then-
Pain in the stomach or intestines = use marshmallow root tea, it will help with the inflammation (also have a look at the Bowel Cleanse Forum at Curezone)
Pain is getting worse under stressful situations. = Adrenal issue (read on the topic here and on the forum)
Passing gas.= undigested food are fermenting into your bowels = you are feeding candida.
Your portocol is fine a lot of chemical medication (I am old school and prefer the natural stuff) You will want to think antioxydant: vitamin C - zinc OR selenium perhaps vit B complex and magnesium as well.