I am constantly cold even in the summer?

I was recently diagnosed with Leukemia... Since then I have been colder than usual. My nose, fingers, toes. If I wash my hands in warm water, they get frigid immediately after. Even in 96 degree weather, I wear sweatshirts and jackets. Here's the weird part. I am FREEZING during the day (which is when I'm active) And then I BURN UP during my sleep. I'm only 16 years old, and I want to know if this could be a side effect of my Leukemia? Thanks