Yikes, my hair is falling out. Not in clumps, but kind of like when you are
in chemotherapy.

The only thing I can think is we had work done in the kitchen where, it
turns out, they used a lot of toxic chemicals.

Could that do this? Or is it a nutritional deficiency of some kind?

I've been supplementing calcium/mag recently, could this put something else
out of balance that would affect hair?