Nerve Disorders :: Involuntary Muscle Tensing & Contorting -dystonia?

I often involuntarily tense up and sometimes contort my muscles into painful positions—for example, arching my back deeply or sharply pointing my foot/toes. This occurs randomly, and many times every day. It happens in 1-3 areas of my body at a time, in varying combinations—including my jaws (clenching), tongue, back, hands, arms, buttocks, legs and feet. I don't realize I'm doing it until it starts to hurt! Once I'm aware, I can force the muscles to relax, but it just happens again after 10-30 secs, or if not that soon, a few minutes later (in the same part(s) of my body, or different one(s). It makes my muscles (and sometimes the joints) very fatigued and painful. I thought maybe it was anxiety, but it happens when I have little-to-no anxiety at all, and I've tried relaxation methods, stretching, anti-anxiety meds, all with no success. Someone I know told me that my symptoms seem very similar to the early symptoms of her dystonia. I don’t really know anything about dystonia, so if someone could tell me if this problem sounds like dystonia or not.

P.S. I’ve been diagnosed with: Asthma; ADHD; Constant Headache; Fibromyalgia; GERD; Irritable Bowel Syndrome; Idiopathic Tachycardia; Migraine—without aura; Depression; several musculoskeletal conditions (right shoulder, right knee, left foot); Keratosis Pilaris; Eczema; Upper Airway Resistance Syndrome; and Hypothyroidism. I also have the following symptoms that doctors haven’t yet diagnosed or attributed to any of my already diagnosed conditions: Ear Problems: pain (right ear, spreads to the neck just below ear, and to the surrounding facial area), stinging and itching sensations deep in the right ear, and bilateral paroxysmal tinnitus; Eye Pain/Visual Problems: left eye pain (accompanied by a gnawing numbness around that eye), bilateral eye pain (separate from aforementioned left eye pain), poor night vision, “trailing” (after lying down), and “ghosting” (upon exertion); Numbness/Tingling—entire left side of my body; Altered Taste—constant odd tastes—metallic, bitter, sour/citrus; Dizziness and Poor Balance/Coordination; Fainting/Falling; and Hair Loss.