2D player movement problems (moving by itself)

So, I have a PlayerMovement script, which has keypresses and all in it. The player moves fine however sometimes when I let a key up the player continues to move automatically.

Here's the code : (if you need anything else just tell me!)

     void Update () {
 
         // Speed limiting
 
         if (playerRigid.velocity.x > speedLimit)
         {
             playerRigid.velocity = new Vector2(speedLimit, playerRigid.velocity.y);
         }
 
         if (playerRigid.velocity.x < -speedLimit)
         {
             playerRigid.velocity = new Vector2(-speedLimit, playerRigid.velocity.y);
         }
 
         // Movement Inputs
 
         if (Input.GetKey(KeyCode.D))
         {
             playerRigid.velocity = new Vector2(speedLimit, playerRigid.velocity.y);
             playerRigid.AddForce(Vector3.right * speed * Time.deltaTime);
         }
 
         if (Input.GetKey(KeyCode.A))
         {
             playerRigid.velocity = new Vector2(-speedLimit, playerRigid.velocity.y);
             playerRigid.AddForce(-Vector3.right * speed * Time.deltaTime);
         }
 
         if (Input.GetKey(KeyCode.W))
         {
             playerRigid.velocity = new Vector2(playerRigid.velocity.x, speedLimit);
             playerRigid.AddForce(Vector3.up * speed * Time.deltaTime);
         }
 
         if (Input.GetKey(KeyCode.S))
         {
             playerRigid.velocity = new Vector2(playerRigid.velocity.x, -speedLimit);
             playerRigid.AddForce(Vector3.up * speed * Time.deltaTime);
         }
 
 
         // UP PRESSES
 
         if (Input.GetKeyUp(KeyCode.D))
         {
             playerRigid.velocity = new Vector2(0, playerRigid.velocity.y);
         }
 
         if (Input.GetKeyUp(KeyCode.A))
         {
             playerRigid.velocity = new Vector2(0, playerRigid.velocity.y);
         }
 
         if (Input.GetKeyUp(KeyCode.W))
         {
             playerRigid.velocity = new Vector2(playerRigid.velocity.x, 0);
         }
 
         if (Input.GetKeyUp(KeyCode.S))
         {
             playerRigid.velocity = new Vector2(playerRigid.velocity.x, 0);
         }
 
     }