So I tried vitamin A and had crazy energy all day, explosive! I had breakouts of red marks on my face. This little experience hinted at my problem. I was dosing below 400 IU D3 and hadn't had any calcium for 9 months (low calcium), eating the same food breakfast, lunch and dinner.
If I dose up to 200 IU D3, I can take 3000 mg calcium supplement no problem. Two weeks ago I was taking 600 IU D3 and eating foods with calcium would trigger hypercalcemia symptoms even with normal calcium levels.
After taking calcium supplements and <200 IU D3, my veins expanded, I felt warm again, nausea, cold hands and feet, sneezing and coughing spells vanished. Also what appeared to be a virus from hell quickly vanished, like within hours.
If I take 300 IU D3, I still don't have any of those symptoms above when taking calcium supplements, but I feel high and strange.