I have b-12 deficiency and take supplementals shots for over a year now; I was diagnosed a year earlier with a movement disorder, Essential Tremor. I now have a vitamin D deficiency; I'm 47 years old. Neuro/MDS will not rule out MS as the tremors progress and I have issues with balance, weakness in knees...severely low b-12 (117 when caught) caused peripheral neuropathy...on lots of meds for the tremor....now with the vitamin D deficiency diagnosis yesterday (17) - I'm further concerned I've got early MS...any thoughts?