What Causes Excessive Sweating, Cold And Headaches Only During Nights?

I work nights, I sleep during the day for the most part but by the time 7pm hits, I m drenched in sweat. My legs, back, neck, really just my entire body. But I m still cold. I ve had headaches everyday for about 4 years and the excessive sweating at night started about 2 years ago. That s about when I started my night job. My mother just passed away at 42 years old for something unknown. They couldn t figure anything out. They just said something in the electrical of her heart went wrong. My sister has a heart murmur. My mother said something about the thyroid, which runs in the family.