Last night I was in my bed looking on my tablet when allmof a sudden my vision motion blurred up to down for a few seconds . I was dizzy for a little while upon standing. I took my blood pressure which was 171/97 and my suger was 170. I take blood pressue medication but not taking any diabetic medication because my doctor said that my sugar is quite hig enough for pill form to reduce sugar. I had this epidode twice at work last year and was scary. What could this be?