Deb, Hi!! If your meds. are not helping you. You need to tell your Dr. Yes, your neck will feel stiff and hard. In time it will get better. You can not expect it to be healed in such a short time.
You can slowly start moving your head side to side and up and down to start stretching the muscle. But I would get your pain meds. up to wear they should be. Part of recovery is rest, and you can not get much rest when you are in pain. Hope some of this was helpful,
Welcome to OCF, there are many here that will be able to help you as you go into the rest of your treatments.
Take care ..Diane