hi there, yep good idea to get the calcium intake aligned with the D3 intake. i don't believe i've heard anything about calcium being too high in ms. shouldn't be hard to find a balanced multi with your daily requirements for calcium (1200mg), magnesium, d3 and zinc all in one pill. you can take additional doses of magnesium and zinc for their own merits away from the d3 component also. i mention zinc because it helps the magnesium stick, and because you mentioned temperature regulation - zinc also aids circulation. "The deficiency of zinc has an effect on circulation; it has been linked to cold hands and feet..." it's commonly down in ms patients. normal range 11.5-18.5. me: 8.6 at last test.
about iron being high, what i understand is that iron tests come back falsely high in inflammatory conditions. mine shows up lately as "high" in my doc's estimation [i.e. 82, lab's normal range 51-140], but the lab printout says that's "probably not iron deficient" - not the most confidence inspiring of assessments. so take it, i say (depending on if it's "high" like mine, or really high, as in up near the top end of the normal range).
if you have an amenable GP, i'd go for numbers in as many of the b-vitamins as you can get, d3, iron, calcium, magnesium, and zinc. plus uric acid if you're curious about that angle. they can all come back "inside the normal range" but if it's also in the "ms normal range" then you can decide if you need to rejig any of your current regimen.
on my last set of tests i also asked for retinol, phosphorus, potassium, sodium, and chloride. unfortunately i don't know enough about these now, to make use of the levels that came back yet.
good luck with it WW, oh and if you do start up any minerals again give em a week to settle in.
and one other thing, i have to take my zinc 50mg at a time. 100 makes me sick so i am supposed to take one morning one night. except i've run out and been really lazy about getting more. better get on that tomorrow!