Is it really muscular pain or joint pain?
If indeed it is muscular. You want to know that candida depletes magnesium and vitamin B. So you'll want to supplement in magnesium for when your metabolism is in need it will go get some in your muscles.
Furthermore, if you are deficient in mag. you will be as well in calcium, for mag. is essential in order to assimilate calcium. Therefore you should supplement in calcium as well or your metabolism will go get some in your teeth and bones.
The BEST supplement is liquid. Candida is all over your bowels inhibitting assimilation so the liquid form assimilates better... especially so until you have completed a bowel cleanse. So magnesium chloride is your best bet just now. It tastes awful, but diluted in a full glass of water, it tastes alright and will be even easier to assimilate. For the calcium, any calcium Fizz which dissolves in water is your best option just now.
diet is not even fruit sugar, no tea, coffee, vinegar (except Apple cider Vinegar) etc. Right?
Furthermore, to help with herx, you need to use antioxydants.
I believe that one should also supplement in vitamin B complex (this is very disputable as not everyone agrees on that issue). Loads of vitamin B I am definitely against but for anyone having a severe case of candida and having to carry on with the diet over months, or years, I belive that B complex is essential (it is essential for good digestion and you will end up with zero digestion if you dont supplement ).