2d Platformer Jump problems

I've been building the code to make the player jump

The issues were

• The player jumps 2 times but locks up afterwards

• The Player jumps continually instead jump twice then do thing again at any time

Here is the codes:

using UnityEngine;

using System.Collections;

public class Player : MonoBehaviour {

 //Stored Game Data - Private
 
 private bool facingRight = true;
 
 [SerializeField] private float Speed = 10f;
 [SerializeField] private float JumpStrength = 450f;
 
 [SerializeField] private bool airManipulate = false;
 
 
 //Stored Game Data 2- Private
   
 private bool grounded = false;
 private int jumpCounter = 0;
 
 void awake()
 {
  
 }
 
 private void FixedUpdate()
 {
  
 
     //// Reset double jump
     //if (grounded)
     //{
     //    doubleJump = false;
     //}
 }
 
 public void Movement(float move,  bool jump)
 {
     //Air Control
     if (grounded || airManipulate)
     {
         //Move the Character/Characters
         GetComponent<Rigidbody2D>().velocity = new Vector2(move * Speed, GetComponent<Rigidbody2D>().velocity.y);
 
         if (move > 0 && !facingRight)
             Flip();
         else if (move < 0 && facingRight)
             Flip();
        
     }
 
     //Disable double jumping after being used
      
    
 
    //Should the player to jump...
         if (grounded && jumpCounter !=0)
         {
             //grounded = true;
             //doubleJump = false;
             ////Reset vertical velocity when double jumping
             //GetComponent<Rigidbody2D>().velocity = new Vector2(GetComponent<Rigidbody2D>().velocity.x, 0);
             jumpCounter = 0;
          
         }
         //Disable double jumping after being used
        
       if((grounded && jump) || (!grounded && jumpCounter < 2 && jump)){
 
                    
                             GetComponent<Rigidbody2D>().AddForce(new Vector2(0f, JumpStrength));
                             grounded = false;
                             jumpCounter+=1;
                     }
        
    
    
 }
 
   
 
 private void Flip()
 {
     //Switch the way the player is labelled
     facingRight = !facingRight;
 
     //Multiply
     Vector3 theScale = transform.localScale;
     theScale.x *= -1;
     transform.localScale = theScale;
   
 }

}

And this is the one for PlayerControl:

using UnityEngine; using System.Collections;

 //It will need an Script "Player"
 [RequireComponent(typeof (Player))]

public class PlayerControl : MonoBehaviour {

 private Player character;
 private bool jump;
  

     private void Awake()
     {
         character = GetComponent<Player>();
     }
     private void Update()
     {

         if (Input.GetButtonDown("Jump"))
             jump = true;
          
     }
     private void FixedUpdate()
     {
      
         character.Movement(1, jump);
         jump = false;
                    
     }

}

Any suggestions on how to make the player jump twice without it locking up?