I am a 27yo african american female. For the past week or so, my fingertips have been discolored (somewhat pale) and kind of numb, only on the pads of my fingertips. Also I got a paper cut on one of those fingers that have not started to heal. What I also observed is that when I put my hand in warm water, the discoloration gets worse. My other hand is fine. Any ideas what it may be?