Since I gave birth to my first child seven months ago, I have had coldness and pain in my lower legs. I started with numbness in heels of my feet at 8 1/2 months pregnant but that seemed to have subsided but the coldness and the pains didn't start until 2 weeks after birth of my child. I had natural childbirth w/no drugs. Any idea what this could be and what doctor I should seek for help?