Obviously I'm not aware of your personal situation. I've been through some pretty painful experiences which in over the years take their toll.
I've got two prolapsed disc's that press against my spinal cord causing severe back pain.
I was hit by a car when I was on a motorbike breaking my leg in 4 places.
I learned though that if I look after myself as much as I can physically, My body feels better, much better than when I don't.
The muscle - skeletal system has evolved and NEEDS to be used. Exercising and stretching are so important.
If you exercise, you will relax and sleep more comfortably.
If you stretch, your muscles wont feel as 'knotted'. Muscles will knot and tighten if not used properly over time. This leads to pain.
I'm not saying this is the cause of your pain, but if you do exercise and stretch properly, I'm betting you would at least feel somewhat better after a while.
Hope you feel better soon