The first thing I want to say is I’m really sorry you and your son are going through so much right now. I can tell you what my therapist would say about the anxiety is to try not looking to far into the future but rather focus on what can be done today. Uses your senses to help ground you. I also use a coloring app to slow my brain and my thinking down. I would call the good hospital if you have not done so already and ask them what their procedure is. It may actually be different with the coronavirus going on. In other words they may not allow you to wait in an emergency room for a week like they would during normal times which could work to your advantage. In regards to your back issue, I would recommend you contact your doctor. They may be able to prescribe physical therapy for you. I know I have to do that sometimes. now I have certain pool exercises that I do. Even though right now I’m afraid to go to the pool but you get my point.