More than likely its ur ligaments stretching..I would have that when I was pregnant, sometimes I would have to stop what ever I was doing and crouch down it hurt so bad, I would cry sometimes..Lol...But I was fine and my lil girl is normal and healthy (besides the fact, she can eat her own weight in a day! Lol j/k)....

Yeah your body is prob, just strectching.I hear that that can be very painful. Good luck!

<3
gaby