Many vegans are deficient in vitamin B (essential for good digestion) FURTHERMORE, candida depletes vitamin B (and magnesium) so supplementing is a must, until you are over with candida: B complex 50mg + chloride magnesium.
The juice semi-fast is fantastic. Remember, only fast until your energy level starts to drop. When it does, start eating a bit more soup. You could carry on for longer then a week (great option) as long as you maintain a good energy level.
Identifying your intolerance is important. Some people need to blanch nuts before eating them. If you suddenly feel really tired after a meal, try and identify what you ate that might have provoked this.