Have you tried taking licorice root? I often drink licorice root tea. It helps boost my mood, and decrease the fibromyalgia pain. Carnitine supplements 1 or 2 grams a day may boost your energy.
Creatine supplements may improve muscle fuction. Magnesium malate(magnesium with malic acid) may also help boost your energy.

A multivitamin probably won't contain enough magnesium unless it is one of those 8 pill a day formulas. My magnesium intake is over 800 mg a day. I take over 500 mg in pill form, and over 300 mg a day in my diet. I also get over 1,200 mg a day of calcium.

I am also sensitive to heat, and tend to run low temperatures. At times my temperature is in the 96.6-97 degree range. I take 25 mg a day of iodine plus 200 mcg a day of selenium(plus I might get up to 200 mcg a day of selenium in my diet). Selenium is needed to convert t4 to the more active T3. In the body mercury binds with selenium making it unavailable.

Taking molybdenum 500 mcg a day will help decrease the sensitivity to perfumes and diesel fumes, which is an aldehyde sensitivity. Candida also produce aldehydes, so those who have sensitivity to perfume and diesel fumes are also likely to have candida overgrowth. Molybdenum is part of the enzyme the body uses to break down aldehydes(and also the enzyme that breaks down sulfites).

How much vitamin D did you take? Do you mean you took 5,000-10,000IU a day?

Brain fog when using ALA might be due to stimulating candida growth, and not detoxification.

Increasing your salt intake(don't overdo it though) might decrease the lightheadedness. Does your nlood pressure sometimes get too low?