Well emotional causes for candida generally deals with a denial of self, being very split between ideas and quite often hanging on to the past.
The emotional cause must be revealed and addressed.
For Candida the grains are the same as Sugar or fruit. (Some provide for the more alkaline ones like quinoa)some allow fruits and cheese and such but use sense rather than rationalization. These feed candida. If you have candida on a physical level it is there to tell you that what you are eating is not for you, regardless if it is healthy or favorable for others.
A candida diet must be strict and should include no starches, sugars, fruits, grains, yeasts or fermented products for 6-8 weeks or more. You say you have a milk allergy is it to casein or lactose??? 36-48 hour fermented kefir usually is safe for those with allergies. Kefir grains are free to very low cost so you should try. Properly made homeade kefir is thousands of times more potent that homemade yogurt and commercial kefir and millions of times more potent than commercial yogurt which additions of a few bacteria is generally a marketing ploy. The most stubborn and virulent of candida problems should be overcome within 2 months time with regular consumption of homemade kefir, proper diet and proper mental/emotional health. if not emotional issues need to be revealed and addressed. If the milk kefir does not work you may use the grains to ferment a fruit juice or some other medium but you must do it in a fashion that utilizes all the sugars. i am not aware or rather posessing knwledge of yogurt from nuts.
Diet must be simple if you figure out what is safe to eat it is a small variety of foods which will give you that lightness you desire. Simplicity is the key. Simplicicty will spread throughout your daily life and you will release the emotional blockage that may cause candida.\
Amalgam removal would most likely exacerbate or cause a shift in candida did you notice this?
There are many ways to go, I would not go the way of those who have candida and have ONLY been doing physical protocol for months upon months and years upon years. A bunch of supplements are not necessary or needed. they generally cause candida to change to one of it's myriad forms causing resistance.
Once the time of strict diet is over and you have looked deep inside to break down emotional walls, your body will begin to serve you and you can eat anything from the previous forbidden list and candida will still be there doing it's job yet it will be in the proper balance as you yourself are interiorly balanced in a deep sense.
As for the gray I do not know it was a spontaneous image that appeared, I shall keep mindful if anything else pops up