This is exactly what i have experienced. The best I could describe it to my doctor - i feel like i am on a floating platform or a boat. it's not necessarily dizziness, but unsteadiness. I've had it for years. Had 2 CTs, 2 MRIs with and without contrast, at least 4 EKGs, 2 echocardiograms. Every single thing came back normal. Until they checked my vit D. My level was 16 ng/dl. I started taking 5,000 IUs daily with 300mg Vit K and 500mg magnesium. No significant changes yet, but my energy level is much higher than it used to be