If you are wearing good N95 masks that may be helping you as well. Many years ago I had an "Aa Ha" moment when working in the Bryant St basement. I knew there was mold down there, and I knew it would make me miserable. That day I was doing some sanding so I put on a good N95. An hour and a half later I felt a LOT better. Hmm, went to the basement and felt -better-? Oh, mask. I've used one in moldy places since and, for me, it really helps.
Edit;
Yes, air monitoring sites seldom give mold counts - or for that matter particulate counts that are correct when there is fire haze. Grrrr.