How to do half Screen Swipe Controls

Hello, I'm trying to use swipes performed on one half of the screen to control my player. The swipes registered are consistent, sometimes detecting the wrong direction even. My update function looks like this

     foreach (Touch touch in Input.touches)
     {
         if (touch.position.x < Screen.width / 2)
         {
             if(Player.transform.position.z == 0) // initialize the players run cycle
             {
                 if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began)
                 {
                     Player.direction.z = forwardspeed;
                 }
             }
             else 
             {
                 if(Input.touchCount > 0  && Input.GetTouch(0).phase == TouchPhase.Began)
                 {
                     startTouchPos = Input.GetTouch(0).position;
                 }
                 
                 if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Moved)
                 {
                     currentTouchPos = Input.GetTouch(0).position;
                     Vector2 distance = currentTouchPos - startTouchPos;

                     if (!stopTouch)
                     {
                         if(distance.x <-swipeRange)
                         {
                             swipeText.text = "Left";
                             stopTouch = true;
                         }

                         else if (Distance.x > -swipeRange)
                         {
                             swipeText.text = "Right";
                             stopTouch = true;
                         }
                         
                         else if(Distance.y > swipeRange)
                         {
                             if(Player.controller.isGrounded)
                                 Player.Jump();

                             swipeText.text = "Up";
                             stopTouch = true;
                         }
                     }
                 }

                 if(Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Ended)
                 {
                     endTouchPos = Input.GetTouch(0).position; 
                     stopTouch = false;
                 }
             }
         }
        
     }
  
 }