A wierd happening

Yesterday, I was driving home and it was about 30 something degrees (F) and I got really hot and sweaty and had to remove my jacket and gloves and roll my windows down in the freezing rain to keep from throwing up and passing out. I finally got home and eventually began to feel better. When I got home however, (I am not sure if this is related to the "episode" or not) I looked at my hands and the tops of them, mainly my knuckels, were turning black. I am not exaggerating. They were so black that they looked like they had been beaten and bruised. They returned to normal but they looked for a bit like frost bite. My fingers were not blue or black, they were red, but i really looked frost bitten. They are better now, but I am so confused. I know reynaulds will make your finger nail beds blue, but my knuckles turning black? Has this happened to anyone else?