I read a description of how candida spreads through the body the other day and thought part of it may be relevant to you:
'When the immune system is weak, candida easily overruns the intestinal tract and the vagina, sinuses and surfaces of the tongue. It also can burrow deeper into various organs. A carpet-like mass will wrap around the spinal cord and the nerves and often accumulates at the base of the brain.' (Donna Gates, The Body Ecology Diet)
If not this, it could be that your Candida has caused you to develop a fat intolerance, but the symptom of this (among many others) is pains in the neck and shoulders, which I'm not sure is what you're experiencing. If it were a fat intolerance, you could cut out all fats for a week and see how you feel, then introduce a small amount of organic coconut oil.