Whenever player gets hit, it keeps getting pushed despite bool off?

I'm nearly done with my player's Main code but I just need to get over this hurdle to complete it. I'm trying to add pushback whenever the player gets damaged by anything tagged with "Enemy". I've used a boolean check in FIxedUpdate part and from what I understand the player should only get pushed whenever the boolean is on. Weirdly, the character keeps getting pushed despite bool check showing the tick off.

Here's the code: using UnityEngine; using System.Collections;

 public class PlayerMain : MonoBehaviour 
 {
    
     //Variable 
    
     public bool PBenabler;//p
     public float maxDashTime;//p
     private float currentDashTime;//p
     
     Vector3 forward, right;//m
     public float moveSpeed = 4f;//m
     
     private Vector3 moveDirection;//m 
     private bool moveEnabler;//m
     
     public float force;
     public float gravity = 3F;//m
     public float MaxHealth = 100f;//h
     public float CurHealth;//h
     public GameObject Health;//h
     public bool alive;//h
     
     
     void Start()
     {
         
     //P/ush Back script    
     currentDashTime = maxDashTime;
     
     //H/ealth script
     alive = true;
     CurHealth = MaxHealth;
     SetHealth ();
 
     }
     
     public void TakeDamage(float amount)
     {
                 
         CurHealth -= amount;
         SetHealth ();
         
         if(CurHealth <= -0f)
         {
             alive = false;
         }
 
     }
     
 
      void FixedUpdate() 
      { 
          CharacterController controller = GetComponent<CharacterController>();// is the controller on the ground?
          
          if(PBenabler == true)
          {
         moveDirection -= transform.forward * Time.deltaTime * 15;
          }else if(PBenabler == false)
          {
         moveDirection.y -= gravity * Time.deltaTime; //Applying gravity to the controller
         controller.Move(moveDirection * Time.deltaTime); //Making the character move
          }
          
         //CharacterController controller = GetComponent<CharacterController>();// is the controller on the ground?
 
         forward = Camera.main.transform.forward;// Set forward to equal the camera's forward vector
         forward.y = 0;// make sure y is 0
         forward = Vector3.Normalize(forward);// make sure the length of vector is set to a max of 1.0
         right = Quaternion.Euler(new Vector3(0, 90, 0)) * forward;// set the right-facing vector to be facing right relative to the camera's forward vector
         
         if(( (Input.GetAxis("Horizontal") != 0) || Input.GetAxis("Vertical") != 0) && alive == true)//disables allowing any keys aside from WASD and UP DOWN LEFT RIGHT keys
             {
             moveEnabler = true;
             }else 
             {
             moveEnabler = false;
             }
         
         if(controller.isGrounded && moveEnabler == true && CurHealth >0)
         {
         Move();
         }
         
         if(controller.isGrounded && GetComponent<AudioSource>().isPlaying == false && ( (Input.GetAxis("Horizontal") != 0) || Input.GetAxis("Vertical") != 0) && CurHealth >0)
         {
         GetComponent<AudioSource>().volume = Random.Range (0.7f, 0.9f);
         GetComponent<AudioSource>().Play ();
         }
         
         moveDirection.y -= gravity * Time.deltaTime; //Applying gravity to the controller
         controller.Move(moveDirection * Time.deltaTime); //Making the character move
         
      }
      
     void OnTriggerEnter(Collider c)
     {
     
         if (c.gameObject.tag == "Enemy")
         {
             PBenabler = true;
         } else
         {
             PBenabler = false;
         }
     }
     
      void Move()
      {
          Vector3 direction = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
         Vector3 rightMovement = right * moveSpeed * Time.deltaTime * Input.GetAxis("Horizontal");
         Vector3 upMovement = forward * moveSpeed * Time.deltaTime *Input.GetAxis("Vertical");
 
         Vector3 heading = Vector3.Normalize(rightMovement  + upMovement);//controls where its facing
         
         transform.forward = heading;
         transform.position += rightMovement;
         transform.position += upMovement;
      }
 
     public void SetHealth()
     {
         float P_Health = CurHealth / MaxHealth; //if CurHealth 80/100 = 8f
         //P_Health value vaule between 0 and 1
         Health.transform.localScale = new Vector3(Mathf.Clamp (P_Health, 0f, 1f), Health.transform.localScale.y, Health.transform.localScale.z);
     }
     
 
 }

I've tried using coroutines for the first time, it still keeps getting pushed.