FPS control camera

Hi there I am making a fps game, my character can slide. My problem is that my camera is doing the same movement as my character which means when im sliding, my camera looks in the sky.

Is there a way to control my camera when I slide to make sure i m seeing whats in front of me.

Here is my code

void Update () { if(grounded && Input.GetMouseButtonDown(1))

 {
    slideInit();
 }

 if(!grounded && Input.GetMouseButtonUp(1))
 {
    slideExit();       
 }

} void slideInit()

{

 transform.Rotate( new Vector3 (-90.0f, 0, 0) );
 grounded = false;

}

void slideExit()

{

 transform.Rotate( new Vector3 (90.0f, 0, 0) );
 grounded = true;

}