What Causes Cold Sensation On Sprained Foot?

I may have sprained my food along the side of my right foot or I m querying a stress fracture. It feels different then my usual plantar fasciitis I get from running. This gets worse with movement not better it s 3 days had accupuncture with electrical,stimulation and some ART done,,used my TENS machine on it , have been RICE -ing it. But noticed today my foot is freezing to,touch and into the lower leg as well. There is little to no swelling. Is the cold normal? How,long should I wait until I get X-ray,if my chiro treatments don t make a difference.