Been living with a subtle headache since the weekend, and have noticed that I've not been as sensitive to the heat as the family.  As a matter of fact, have been getting chilly with the air conditioning on---and it's been around 100F. outside.  Then it hit me last night, all of a sudden.  Anemia.  Again.

Thought I'd been keeping on top of my iron, but apparently not.  Took some before bed, hoping it'd not wake me up, and all's well.  Must've skipped a couple of days of taking my vitamins and not realized it.  Such a small change in routine can make a huge difference.