Thank you for the suggestion! A friend gave me a lovely wearable blanket, which I've worn to chemo before, but it isn't thick so I don't know if it's any warmer than their rather nasty blankets. It is definitely nicer though! 😁 She also gave me a (surprisingly pretty) poncho which is another possibility.
I think it will have to be layers but last time I had trousers, cami, top, down vest, maybe something over that, two of their "orphanage chic" blankets and was still teeth-chatteringly freezing. Nurse did say it was one of the colder bays, but no-one else was visibly suffering. I'm very underweight and that must be contributing to being so cold, I feel much colder at home than I used to as well.