MacBook Pro Screen

Whenever I open my macbook Pro, the screen makes almost a popping sound. It appears that the screen is slightly detaching from the keyboard. Because of this, the screen itself wiggles all over the place and I cannot used any form of video chat or FaceTime because the camera will freeze unless the screen remains in one specific spot. Has anyone else had this problem? Also if anyone has, is it possible to be fixed, and if so, how much approximately would it cost?