If you are battling toxic mold from living in a building that was flooded you most likely have an aspergillus infection of the respiratory system, not the digestive system.
I would not be so quick as to assume that what you are seeing in your stools is cholesterol. I seriously doubt it and even if it was cholesterol I would tend to think that it would mean that your cholesterol was way high, not low. Did you have a blood test for cholesterol levels? Was it low? Anyway, I don't know what it was that you were passing in your stools.
The above two issues really don't have any bearing on my post. I wish you well and hope you find the answers you are looking for.