Do you have any problems with your sense of smell or taste? If so, then you probably aren't getting enough zinc. Tinnitus is often caused by a magnesium deficiency, and zinc also helps relieves tinnitus. A large percentage of those living in the US and the UK are deficient in magnesium. Calcium and/or magnesium deficiency often contribute to insomnia. Muscle cramping points to a magnesium deficiency. Are you sensitive to perfumes?

Cigarette smoke is full of arsenic and cadmium, so in addition to mercury, you might still have plenty of those in your body, and perhaps lead as well. DMSA is good for chelating all of those metals. ALA is not so good at chelating lead. I don't know how effective it is at chelating other metals.