Gosh, not sure. Not really heard of foot pain as part of pregnancy. However, back pain and something called sciatica is common. Sciatica is when a nerve is pinched and you feel pain radiating down your buttocks into your hamstring. I wonder if gentle stretching would help you. Take a tennis ball and roll your foot over it, stretch your calf and hamstring. See if that helps. And when you can get to your doc, talk to them. good luck