while turning on bed, my baby got some kind of muscle pull or kind of bend on her right arm or shoulder, she cried for some time but later was ok, but I doubt she might have got some muscle pull or pressure on shoulder, because after that incident she is not moving her right arm as she used to.. all her fingers are moving ok, she is not crying so I think there is no pain as well, no inflammation seen, i tried to touch her arm all over to notice if she cries or feels any pain, but there is something wrong, as she not moving her right arm as she used to do everytime... what should we do ?