I suggest Pilates, which focuses on correct alignment of the spine and strengthening the core (torso) muscles. Those are the ones which in fact support your spine. Pilates began as a method for rehabilitation of war veterans. Still very much in use. Rather than trying to find a treatment, invest in your own body care.
Try to find a practitioner that doesn’t treat it like a fun exercise class but rather addresses your particular physiological problems (initially you might do some private sessions). Also, avoid yoga, the way it is generally taught isn’t safe for many people.
My experience is that acupuncture does help relax muscle groups, which you may find helpful. Lot of woo out there, but acupuncture does have effects on some kinds of pain. Western medicine is shitty for any kind of chronic pain or anything that surgery won’t help. Great for appendicitis, but not for what you describe.