Odd outside clicking issue.

So I am making a Level like a FPS but my problem is when I click to fire, my mouse is automatically clicking over the "Pause game" button at the top of the screen. I know that this wont happen once the game is built, but I need it fixed for testing. So how do I fix that? Here are my "Mouse related" scripts.

First person controller script:

using UnityEngine; using System.Collections;

[RequireComponent (typeof(CharacterController))] public class FirstPersonController : MonoBehaviour {

 public float movementSpeed = 5.0f;
 public float mouseSensitivity = 5.0f;
 public float jumpSpeed = 7.0f;
 
 float verticalRotation = 0;
 public float upDownRange = 60.0f;
 
 float verticalVelocity = 0;
 
 CharacterController characterController;
 
 // Use this for initialization
 void Start () {
     Screen.lockCursor = true;
     characterController = GetComponent<CharacterController>();
 }
 
 // Update is called once per frame
 void Update () {
     // Rotation
     
     float rotLeftRight = Input.GetAxis("Mouse X") * mouseSensitivity;
     transform.Rotate(0, rotLeftRight, 0);

     
     verticalRotation -= Input.GetAxis("Mouse Y") * mouseSensitivity;
     verticalRotation = Mathf.Clamp(verticalRotation, -upDownRange, upDownRange);
     Camera.main.transform.localRotation = Quaternion.Euler(verticalRotation, 0, 0);
     

     // Movement
     
     float forwardSpeed = Input.GetAxis("Vertical") * movementSpeed;
     float sideSpeed = Input.GetAxis("Horizontal") * movementSpeed;
     
     verticalVelocity += Physics.gravity.y * Time.deltaTime;
     
     if( characterController.isGrounded && Input.GetButton("Jump") ) {
         verticalVelocity = jumpSpeed;
     }
     
     Vector3 speed = new Vector3( sideSpeed, verticalVelocity, forwardSpeed );
     
     speed = transform.rotation * speed;
     
     
     characterController.Move( speed * Time.deltaTime );
 }

}

Then my Shooting script:

using UnityEngine; using System.Collections;

public class FpsShooting : MonoBehaviour {

 public GameObject bullet_prefab;
 float bulletImpulse = 100f;

 // Use this for initialization
 void Start () {
 
 }
 
 // Update is called once per frame
 void Update () {
     if( Input.GetButtonDown("Fire1") ) {
         Camera cam = Camera.main;
         GameObject thebullet = (GameObject)Instantiate(bullet_prefab, cam.transform.position, cam.transform.rotation);
         thebullet.rigidbody.AddForce(cam.transform.forward * bulletImpulse, ForceMode.Impulse);
     }
 }

}

I just cant get the darn thing to stop clicking right over the pause button. Any answer helps.