You can try Oxypowder easy to buy online but all it will do if flush the fungus out of your gut. BUT it will also flush out your probiotics and that could make you very sick. Sorry only thing I can think of you trying is difcan and Lamisil tablets every day.
You can buy both very cheap online from the UK. studys have shown taking both antifungals at the same time can kill nasty fungus infections better then just taking one of them.
BUT be warned they are VERY toxic to your liver even more so taken together. If would more of a last resort for you. They could cause liver failure .