Hello, For couple of days whenever I sit,stand,or even change my position I feel dizziness which I have never felt before. It's not internal weakness coz after few seconds it is fine and I am able to complete any given task like walk and drive. But it is happening quite often like 5 to 6 times in a day and to nlbe honest I also felt it when I was fast asleep. Please suggest what should I do and in which direction I should take this in