Will not rotate when going different speed?

So, I have a 2d sprite that needs to move forward when the vertical axis is greater then 0. This works fine. I also made it so that the sprite cannot rotate unless moving forward. But now, I want to have the sprite change speed when shift or control is pressed. But here's the problem. When I press shift everything works great, the sprite goes double the speed and can rotate. But when I press control, it cuts the speed in half, like it is supposed to, but I cannot rotate what so ever. Note it is all in C#.

 using UnityEngine;
 using System.Collections;
 
 public class Car : MonoBehaviour {
 
     public float speed;
 
     float actualSpeed;
 
     public float rotationSpeed;
 
     float actualRotationSpeed;
 
     void Start () {
     
     }
 
     void Update () {
         if (Input.GetKey (KeyCode.RightShift)) {
             actualSpeed = speed * 2;
         } else if (Input.GetKey (KeyCode.LeftShift)) {
             actualSpeed = speed * 2;
         } else if (Input.GetKey (KeyCode.RightControl)) {
             actualSpeed = speed / 2;
         } else if (Input.GetKey (KeyCode.LeftControl)) {
             actualSpeed = speed / 2;
         } else {
             actualSpeed = speed;
         }
 
         if (Input.GetAxis ("Vertical") > 0) {
             actualRotationSpeed = rotationSpeed;
         }
         if (Input.GetAxis ("Vertical") < 0) {
             actualRotationSpeed = -rotationSpeed;
         }
         if (Input.GetAxis ("Vertical") == 0) {
             actualRotationSpeed = 0;
         }
     }
     void FixedUpdate(){
         transform.Translate (Vector3.up * Input.GetAxis("Vertical") * actualSpeed);
         transform.Rotate (new Vector3(0, 0, -1), Input.GetAxis("Horizontal") * actualRotationSpeed);
     }
 }