Once again, I can so relate to this (((((Cyran0))))). I also have chronic muscle pain and tension (specifically headaches and backache), regardless of whether I'm actively worrying about anything or not. I also have other feelings of general malaise a lot of the time (queasiness, fatigue, weakness etc). Again, these physical symptoms are independent of any conscious thoughts or worries. In fact, what happens is the symptoms themselves become a source of worry......
I have come to the conclusion that I have burned myself out from being in a heightened state of anxiety for a long period of time. I think of anxiety as being the equivalent of stress. No one would dispute that long term stress is bad for your physical health. I think it's the same with long term anxiety. If you're pretty much constantly stuck in that "fight or flight" mode, that's going to take a toll on your physical health sooner or later. So even when you've stopped worrying, your body continues to be run down and more susceptible to all kinds of aches, pains and ailments.
That's how I explain it to myself. And it actually helps me to explain it like that. Because then I have something tangible to work with and it explains a lot of my symptoms (as opposed to them feeling like they are totally random and out of my control, which makes them even scarier).
I see a naturopath and she mentioned something called Adrenal Fatigue which is a medical version of what I was trying to describe

I'm taking some herbal stuff to try and balance my adrenals and I'm also trying to step up the meditating. The naturopath referred me to a "body worker" to help me with muscle tension, but since none of this is covered by my insurance and since I've already paid the naturopath an arm and a leg, I'm holding off on the body worker for now!!
Do you do any exercise? I do find that helpful. It definitely makes my body more relaxed. Just wondering if that might be worth a shot for you too??