Has hot yoga screwed up my body temperature?

Over the past few months I’ve gotten really into hot yoga and I love it! I also started using the sauna after my workouts. I think I’m addicted lol.

But the problem is, now that it’s winter, I can’t seem to ever get warm! I’m permanently cold! I dress like a homeless person at work, I wear thermals tops and bottoms 24/7, huge goose down parka, nothing works.

Can you help?