why was I not able to fight it off when I was supernourished/Superwoman?
The weight loss is a symptom. This body rejects food. There just must be a better way.
Depends on how you were addressing it. Many people make the mistake of trying to alkalinize, which can just make it worse. Or their doctors give them antibiotics that make it worse. Even some herbal antibiotics, like goldenseal, Oregon grape root or barberry can aggravate such an infection.
There are herbs that can help though such as yucca root, which not only helps to kill mold, but also helps to increase nutrient absorption. There are also other herbs such as andrographis that can help kill the mold, boost your immune system and cleanse the toxins.
But first things first. You need to get your weight and strength back up first.