A day (night!) or so after the end of a period so I'm not sure that's what it was? Horrible waking up to find myself slick with sweat when I hardly sweat at all normally.
Periods have been light for a long while, but PMT getting worse recently.
I've also been getting heart-thumping anxiety at night, and put it down to stress, now I'm wondering if its menopause-related even though my periods are still occurring.