I have been a long time sufferer of systemic candida. Sometimes I am "good" with my diet, and sometimes I get frustrated and go off. What has worked for me is the Modern Herbalist's Candida Protocol and their companion diet. After implementing the protocol and the companion diet, my health improved dramatically! If you don't have money to spend right now you might try going to the Modern Herbalist website and clicking on the Candida Protocol and then finding the Companion Diet. When I was in grad school, I didn't do any expensive supplementation but just followed a diet very similar to that described on the website. It worked like a charm, but it is hard.
Best of luck