I experienced blinding headaches in the right temple the past couple of days, pain running down my arm yesterday and today my left leg. Today I looked at my fingernails and there is a dark stripe running down the middle of each thumb nail and a jagged line beneath the ring fingernail. None of that was there before the blinding headaches and pain. I m diabetic, have diabetic neuropathy; diabetes, heart attacks, strokes, and high blood pressure run in my family. I ve never smoked, drank alcohol, or did drugs. I ll be 46 in two months, I m female.