Raycast2D Only returns true

I'm bulding a simple 2D platformer but whenever I raycast it only returns true. Even when there is no object as i used Debug.DrawRay and saw the ray was hitting nothing but still the raycast was still returning true even as my player is under all of the Coliders.

 using UnityEngine;
 using System.Collections;
 
 public class Controls : MonoBehaviour {
     [HideInInspector] public bool FacingRight;
     public float Speed = 6f;
     public float RunSpeed = 12f;
     public float JumpDistance = 1f;
     Animator playerControls;
     Collider2D playerBox;
     Rigidbody2D playerRigidbody;
     Vector2 positonToMove;
     float distToGround;
 
     void Start () {
         playerControls = GetComponent<Animator> ();
         playerRigidbody = GetComponent<Rigidbody2D> ();
         playerBox = GetComponent<BoxCollider2D> ();
         distToGround = playerBox.bounds.extents.y;
     }
 
     void Update () {
         float x = Input.GetAxisRaw ("Horizontal");
         Move (x, 0);
         if (Input.GetKey("z")  && IsGrounded() == true ) 
         {
             Jump();
         }
         else if(Input.GetKey("x"))
         {
             Debug.Log(IsGrounded().ToString());
         }
         Animate (x,0);
     }
     void Move(float x, float y)
     {
         positonToMove.Set (x, y);
          if (playerControls.GetBool ("IsRunning") == true) {
             Speed = RunSpeed;
         } 
         else {
             Speed = 6f;
         }
         positonToMove = positonToMove.normalized * Speed * Time.deltaTime;
         playerRigidbody.MovePosition ((Vector2)transform.position + positonToMove);
     }
     void Jump()
     {
         playerRigidbody.AddForce(new Vector2(0f, JumpDistance* 5));
     }
     void Animate(float x, float y)
     {
         bool isWalking = x != 0f;
         bool isRunning = x == 1f || x == -1f;
         bool isJumping = y != 0f;
         bool isFalling = playerRigidbody.velocity.y < -0.1f;
         playerControls.SetBool ("IsWalking", isWalking);
         playerControls.SetBool ("IsRunning", isRunning);
         playerControls.SetBool ("IsJumping", isJumping);
         playerControls.SetBool ("IsFalling", isFalling);
     }
     bool IsGrounded()
     {
         RaycastHit2D myHit;
         int Layermask = 1 << 8;
         Layermask = ~Layermask;
         Debug.DrawRay(transform.position, -(Vector2)Vector3.up, Color.red, 0.1f );
         bool p = Physics2D.Raycast ((Vector2)transform.position, -Vector2.up, /*distToGround*/ 0.1f, Layermask);
         if (p == true) {
             Debug.Log ("T");
         } else {
             Debug.Log("F");
         }
         return p;
     }
 }