Killing Candida DOES NOT work. It is a natural part of the body and the dead Candida just becomes food for the surviving Candida just as if you ate a yeast filled food. This is why people get the rebound infections when trying to kill Candida.
You need to get your stomach acid and flora up. Check my posts I have explained this numerous times.
As far as the constipation goes, again you need to build up your flora. Peristalsis in the intestines is regulated by the serotonin produced by the flora. This is why a lack of intestinal flora causes constipation. And the reason a lack of flora allows for Candida overgrowth is because without sufficient flora there is not enough acids (lactic, acetic, fatty)being produced to control the growth and aggressivness of the Candida.