Input has to be pressed twice.

I'm making a pause menu for my game, the pause menus itself works fine however I have to press escape twice for it to open/close. Also, my cursor appears even if the game isn't paused. What do I do? using UnityEngine; using System.Collections;

 public class Pause: MonoBehaviour {
 
     public bool isPaused = false;
     public Canvas canvas;
     public GameObject player;
  
     void Start()
     {
         canvas.enabled = false;
         Cursor.visible = false;
         Cursor.lockState = CursorLockMode.Confined;
     }
     void Update () {
         if (Input.GetButtonDown("Pause"))
         {
             isPaused = !isPaused;
             if (isPaused == false)
             {
                 canvas.enabled = true;
                 Time.timeScale = 0;
                 Cursor.visible = true;
                 Cursor.lockState = CursorLockMode.None;
                 player.GetComponent<CamLook>().enabled = false;
                 player.GetComponent<Shoot>().enabled = false;
             }
             if (isPaused == true)
             {
                 canvas.enabled = false;
                 Time.timeScale = 1;
                 Cursor.visible = false;
                 Cursor.lockState = CursorLockMode.Confined;
                 player.GetComponent<CamLook>().enabled = true;
                 player.GetComponent<Shoot>().enabled = true;
             }
         }
     }
 }