Ouch, 3 weeks. Im not sure even enema’s would give you the relief you need before then. Truth is, when you fight a candida infection you’ll lose weight and get weaker in the process. Bootcamp will be a hard thing to do, impossible even when you are coping with die off.
If you are sure you are suffering from candida overgrowth (sounds like it), which is a debilitating condition, you wont get rid of it in time.
So, with above reasoning, it is my opinion that you should not start an anti candida protocol until you are ready for it.