I have noticed that thinner people (obviously folk who generally eat less) are more often colder than us more padded specimens.
When I was young and tried to stick to a 1000 cal a day diet and was size 8 I was perpetually cold. Nowadays I am often too hot. Of course it might be thyroid, but it also might be I have a higher calorie intake
There was a tv programme where two doctors who were friends at university were doing a lifetime experiment and it seems to be that if you regularly eat less calories than your body feels you need it will go into "slow mode" which means everything runs more slowly, you will probably live longer and age more slowly but because you are in slow mode you will produce less heat and feel the cold much more.
You will now tell me you are size 22