2D Character shakes when moving diagonally

This didn't use to happen, but I haven't been working on my game for a few weeks. Today I was finally done with schoolwork so I was looking forward to working on the game. However, when I ran it to make sure everything was still OK, my character started shaking when moving diagonally. How can I fix this? I'm totally new to Unity, btw, and coding too.

This is what I've got in the Visual Studio

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class PlayerScript : MonoBehaviour {

 private Rigidbody2D myRigidbody;

 public Animator myAnimator;

 public float moveSpeed;

 private bool facingRight;

 // Use this for initialization
 void Start () {

     myRigidbody = GetComponent<Rigidbody2D> ();
     facingRight = true;
     myAnimator = GetComponent<Animator> ();
 }
 
 // Update is called once per frame
 void Update () {
     
     if(Input.GetAxisRaw("Vertical") > 0.5f || Input.GetAxisRaw("Vertical") <-0.5f)
     {
         transform.Translate(new Vector3(0f, Input.GetAxisRaw("Vertical") * moveSpeed * Time.deltaTime, 0f));
     }

 }


 void FixedUpdate()
 {
     float horizontal = Input.GetAxisRaw("Horizontal");
     HandleMovement(horizontal);
     Flip(horizontal);
 }

 private void HandleMovement(float horizontal)
 {
     myRigidbody.velocity = new Vector2(horizontal * moveSpeed, myRigidbody.velocity.y);
     myAnimator.SetFloat("MoveX", Mathf.Abs(horizontal));
 }

 private void Flip(float horizontal)
 {
     if(horizontal<0 && facingRight || horizontal>0 && !facingRight)
     {
         facingRight = !facingRight;
         Vector3 theScale = transform.localScale;
         theScale.x *= -1;
         transform.localScale = theScale;
     }
 }
   

}

Thank you! Any sort of help is highly appreciated!