Muscle soreness and aches

Marie
Is anyone else constantly sore? I feel like I got hit by a truck most days, esp in my calves. I haven't gained more than 10 lbs and was pretty thin when I got pregnant. I'm still active, but now it's a pain to even climb the stairs, esp in the evening. I wonder if walking would help me stretch more (I sit at work) and alleviate this soreness?