Not to scare you, but I'd check with my doc if I were you. Before I got my blood sugar under control I would sometimes have blue tinged feet, blue nails, cold hands and I felt cold all the time. I haven't had it in a year, since I started losing weight, watching my diet, exercising etc & my blood sugar stabilized. I was hypoglycemic for decades. You might also have your doc check your thyroid since a hypothyroidism can cause that as well.
"Most folks are about as happy as
they make up their minds to be."
- Abraham Lincoln