@stevetaylor721 The intense back pain sounds troubling. That can be a symptom of a heart problem, so please talk to your doctor about that. Do you have a cardiologist? I'm not trying to make you anxious by mentioning this, but my brother in law died of an aortic dissection which is a life threatening problem that is easily missed at the emergency room. It was in his case as he was not feeling well for a couple of days and was seen at 2 emergency rooms. They finally figured it out, but he died before they could get a surgical team in place. It is where the layers of the wall of the aorta start to separate which is the big artery that comes right out of the heart to send blood to the entire body. When it goes far enough, the aortic wall ruptures and very few people survive this because doctors don't catch it in time to do surgery to fix it. Please don't ignore that pain. There must be a reason for it. You will need to advocate for yourself if your doctor is dismissing this.

Here is Mayo Clinic information for heart disease.
https://www.mayoclinic.org/diseases-conditions/heart-disease/symptoms-causes/syc-20353118
and for Aortic dissection. https://www.mayoclinic.org/diseases-conditions/aortic-dissection/symptoms-causes/syc-20369496

Has anyone checked your thyroid functions? If your thyroid is kicking out too much hormones, it does speed things up and cause anxiety type issues, and probably trouble sleeping too. I take thyroid meds and once mine were too high because my thyroid function changed, so my dose became an overdose.

I sure hope that I am not increasing your anxiety by talking about this. If there is a serious problem, catching it early is a good thing. My cousin's wife also recently died of a ruptured aneurysm on the aorta with similar symptoms of upper back pain. Please keep searching for answers and take care of yourself.

Have you been seen by a cardiologist before?