Your kind of young to have a altered gut flora. Taking candida killing remedies will further alter your gut flora. Make sure you are taking heavy heavy probiotics in many forms, kefir, pills, sauerkraut and any other form you get for diversity.
Having a die off response means your body's immune system is responding to the toxins released during killing. When your young your body clears the toxins quickly so the immune system doesn't react. When your older you don't clear toxins as well so the immune system reacts causing flu like symptoms or autoimmune attacks(cytokine storms). If your not having die off aka herxhiemer reactions that's a good thing.
You have the "killing" element down really good. You just need the immune boosting supplements.
-Colostrum- enhances the immune systems intelligence. Colostrum will make the immune system target candida more specifically once biofilms are lifted. Colostrum also seals the gut. Try some colostrum.
Methylfolate and P5P are low in ppl who have candida. Candida disrupts those vitamins to bring down the immune system. Methyfolate builds white blood cells needed for infection and P5P digest amino acids used to make glutathione(infection fighter) and its also a immune stimulant. If you supplement methylfolate you have to use methylb12 with it for it to work correctly.
Once the immune function is brought up to par since its probably slow, along with the killing herbs you will eradicate candida pretty quickly.
Candida also can disrupt amino acid utilization so whey protein or a simple amino supplement will also boost the amino conjugation and absorption.
If candida doesn't go away with that protocol then you will have to remove toxic metal build first before candida leaves.
16 is pretty young to have candida.. So I hope your correct on your diagnosis... Candida is very visible in the stool and there are pictures online to compare if you need too. G-luck.