hey there! ok next time you're stocking up, you could maybe see if you can find kirkman magnesium glycinate. nice sized gelcaps containing powder. you could take one at the same time as the d3, and one at another time of day on its own.
also if you're taking 2000IU vit d3 per day, perhaps a calcium chew of some kind would be advisable. you want to get enough cal, mag and zinc along with the d3. dosed and timed right, of course!
for myself i think i get all the calcium i need from diet, but not everyone is that way - just personally i find if i take a calcium supplement, i start to feel like it's interfering with my magnesium status - ca and mg do compete for absorption.
anyway. kale is awesome. so is chard if you can get the green/white (i read somewhere it's better than the red stem variety, but i don't exactly recall why!).
good luck and do let us know how you get on with your symptoms once some extra minerals are added into the picture