I mostly sweat during periods of inactivity
As I have gotten older, I realize that my internal temperature regulation is less consistent than it was when I was younger.
These days, I will have temporary periods of feeling hot or cold at seemingly random times. Generally, I will feel flushed for a while not long after eating (and especially after breakfast if I also had a cup of coffee) and I usually feel cold for a while when I get into bed, but my AC works and so I am keeping the house in the mid-70sF (low-mid-20sC) but my bed warms up soon enough. Now that it is getting much warmer outside I break into a sweat very quickly when I start working in my garden or walking briskly, but that does not seem unnatural.
As I recall, NT is barely 40 and lives in a temperate area, so I agree that radical overheating seems out of the norm and is worth checking into.