see cardiologist and ask about sleep apnea
my mother had foot problems for years. She had lost a lot of feeling (diabetic for over 30 years) in her feet. I sure you already practice good foot care. I am also diabetic. If your wound will not heal don't wait too long see your doctor. I had a cut that took weeks to heal. Infection comes very easy!
You do need to get checked out by a doctor and a cardiologist, just in case. I take klonopin and magnesium and they really help. Keep a open mind and good luck!