How can I find what's making me sick?

I get sick whenever it's wet outside. OUTSIDE. It's only 35% of relative humidity inside, which is very low. The landlord has been in the attic and found nothing. I have a gadget that claims to find moisture behind walls, and I've also found nothing. I only get sick in my room, and only when... show more I get sick whenever it's wet outside. OUTSIDE. It's only 35% of relative humidity inside, which is very low. The landlord has been in the attic and found nothing. I have a gadget that claims to find moisture behind walls, and I've also found nothing.

I only get sick in my room, and only when it's wet out. What gives? Wouldn't I find something wet if it were mold?
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