We are 5 weeks into winter as it’s calculated in these parts. I had to leave a Zoom meeting early today, I was feeling really cold and shivering violently so I went back to bed at 12:30 pm, turning the electric blanket onto it's lowest setting. Things improved slightly but weren't really good until I wore a heavy jumper & beanie & set the bedroom heater to 19ºC - the room had been at 13º before doing this at about 5 pm.
Roll on 8 pm: the shivering had stopped, I removed the jumper & beanie & reset the heater to a maximum of 17ºC and turned off the electric blanket. I feel fine now.