I've not read all the replies so I may be repeating myself
When I was on TOO many antibiotics for lyme, I was getting systemic candida and vaginal yeast infections weekly. How I finally got rid of them was by taking probiotics (10 billion units a day is enough), coconut oil, Apple cider Vinegar (love this) and olive leaf extract. Works like a charm, no side effects. Another very important factor in keeping candida to a low level is to keep the ph in the body balanced. A good way to achieve this is with lemons.
If you're going to try the apple cid. vin. you need to make sure you buy unpasturized, unflitered with "mother" in it. This format of vin has all the medicinal properties left in it and is very easy on the stomach. I take 2 tbsps a day with a shot of organic apple juice. Then I eat or if I don't eat, will drink a large glass of water after it.
Here are some links.
http://en.wikipedia.org/wiki/Olive_leaf
http://coconutdiet.com/candida.htm
http://en.wikipedia.org/wiki/Coconut_oil
http://www.candida-cure-recipes.com/apple-cider-vinegar-cure.html
I know you're pain. canadida is the worst and nystatin never did much for me. Hope this helps
Jen