Move Character from one position to another position using Key, without changing its speed over-time.

Hello, I'm trying to make a fighting game and I use only 2 keys. I can change the position of my player but every time I reuse the key combination it moves faster. Please help me fix this annoying bug, thanks.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PlayerScript : MonoBehaviour
 {
 
     // LINK TO H'S ANIMATOR
     Animator h_Animator;
 
     // LINK TO H'S SPRITE RENDERER
     SpriteRenderer h_SpriteRenderer;
 
     // H'S ATTACK TIMER
     float attackTimer = 0.0f;
 
     // H ATTACK VARIBLES
     bool doubleSlash = false;
     bool dashStrike = false;
     float currentPos = 0.0f;
     public float transitionSpeed = 0.1f;
 
 
     IEnumerator AttackRight()
     {
         while (true)
         {
             if (transform.position.x <= 3.0f)
             {
                 Vector3 newPos = new Vector3(currentPos, transform.position.y, transform.position.z);
                 transform.position = Vector3.Lerp(transform.position, newPos, Time.deltaTime * transitionSpeed);
             }
             yield return null;
         }
     }
 
     IEnumerator AttackLeft()
     {
         while (true)
         {
             if (transform.position.x >= -3.0f)
             {
                 Vector3 newPos = new Vector3(currentPos, transform.position.y, transform.position.z);
                 transform.position = Vector3.Lerp(transform.position, newPos, Time.deltaTime * transitionSpeed);
             }
             yield return null;
         }
     }
 
     // Start is called before the first frame update
     void Start()
     {
         // FETCH H'S ANIMATOR
         h_Animator = GetComponent<Animator>();
 
         // FETCH H'S SPRITE RENDERER
         h_SpriteRenderer = GetComponent<SpriteRenderer>();
     }
 
     // Update is called once per frame
     void Update()
     {
 
         // H [attackTimer] WILL CHECK IF ATTACK PERSIST
         if (attackTimer <= 0.0f)
         {
             doubleSlash = false;
             dashStrike = false;
             //print("DoubleSlash: " + doubleSlash);
             //print("DashStrike: " + dashStrike);
             attackTimer = 0.0f;
             //print(attackTimer);
             h_Animator.SetInteger("State", 2);
         }
         else
         {
             attackTimer -= Time.deltaTime;
             //print(attackTimer);
         }
 
         // RIGHT ATTACK
         if (attackTimer <= 0.0f && Input.GetKeyDown(KeyCode.Slash))
         {
             
             // DO NOT FLIP SPRITE
             h_SpriteRenderer.flipX = false;
             //print(transform.position.x);
 
             // DASH STRIKE ATTACK
             if (transform.position.x <= 0.0f)
             {
                 currentPos = 3.0f;
                 dashStrike = true;
                 //print("DashStrike: " + dashStrike);
                 attackTimer = 0.88f; // SET [attackTimer] VAR TO SPECIFIC TIME
                 h_Animator.SetInteger("State", 4);
                 StartCoroutine("AttackRight");
             }
 
             // DOUBLE SLASH ATTACK
             else
             {
                 doubleSlash = true;
                 //print("DoubleSlash: " + doubleSlash);
                 attackTimer = 0.66f; // SET [attackTimer] VAR TO SPECIFIC TIME
                 h_Animator.SetInteger("State", 3);
             }
         }
 
         // LEFT ATTACK
         if (attackTimer <= 0.0f && Input.GetKeyDown(KeyCode.Z))
         {
             // FLIP SPRITE
             h_SpriteRenderer.flipX = true;
             //print(transform.position.x);
 
             // DASH STRIKE ATTACK
             if (transform.position.x >= 0.0f)
             {
                 currentPos = -3.0f;
                 dashStrike = true;
                 //print("DashStrike: " + dashStrike);
                 attackTimer = 0.88f; // SET [attackTimer] VAR TO SPECIFIC TIME
                 h_Animator.SetInteger("State", 4);
                 StartCoroutine("AttackLeft");
             }
 
             // DOUBLE SLASH ATTACK
             else
             {
                 doubleSlash = true;
                 //print("DoubleSlash: " + doubleSlash);
                 attackTimer = 0.66f; // SET [attackTimer] VAR TO SPECIFIC TIME
                 h_Animator.SetInteger("State", 3);
             }
         }
     }
 }