Yes this sounds like a real challenge to try and figure out.
I was the exact opposite as you. I always had cold hands and feet, low blood pressure, low thyroid and very low body temperature. I loved the summer and would just hibernate during the cold Canadian winters. I was always freezing while those around me were very warm.
Since doing NB my body temp has gone up and is usually around 98. My whole body is warmer now too. It took quite a few months doing NB before I felt warmer. My blood pressure is now mostly in the normal range also.
I hope you can find the solution so you can find some relief.