The most stupid question coming up... 23 weeks pregnant and just came from a nice little walk -13 miles (took four hours). I felt absolutely fine during the walk and still do (feel great, actually), but everything from my waste down hurts like hell now! the pain started as soon as I stopped walking, bumb is aching so much I cannot move properly ("you idiot", I hear you saying..) Baby is fine and kicking away, but can I cause harm to her by walking like this? Surely (hopefully) this pain are my own muscles and I can't bring on an early labour just by walking?