My advice. Get off your strict diet for some time. Eat healthy but add in a good amount of 'regular' food. If your current diet is making you weaker and weaker it is actually counter-productive to getting your health back on track. The less energy you have, the more your health will deteriorate. Your body needs energy for proper digestion and immune function. The more your energy drops, the more toxins will build up in the body due to lack of proper digestion. Also your immune system will be repressed and unable to keep candida and other pathogens at bay. A healthy immune system is your #1 weapon against candida, forget about anti-fungals.
Yes you can supplement with brown rice protein powder, hemp protein powder, etc. but I really think you need to relax your diet a bit.