It could be circulatory, or neurologic, and most doctors could help you sort that out. Could try a walk in clinic. Sometimes the nerve entrapment is near the instep, the so called tarsal tunnel. Your symptoms are not very common, in any event. You could try to get into a neurology clinic at a university hospital. Also a podiatrist is a good choice. Ask for a cash discount (they will usually allow 15 to 25% off). Good luck. P.S. don't wait very long to get that looked at.