What makes you so sure that the anti fungals are no longer effective? If you use the right ones then it is impossible for candida albicans to become immune,silver is one of these so keep on with it.If symptons get worse once again it is most likely die off rather than candida immunity.Is your diet strict aswell as taking anti fungals? Are you taking a good multi strain high strength probiotic? Biocare do a very good range of probiotics that do actually work unlike 99% of all other commercial brands.I would personally stop all antifungals and concentrate on building a healthy gut by diet and probiotics,exercise and positive thinking.A good probiotic makes a huge difference and actually fends off candida very well so stop antifungals,if you have been taking lots of different a.f's it will put a huge strain on your body,you need to start rebuilding yourself.High dose vit c and a good multi vit can sid you too for a stronger immune system but diet is the main factor.