I get a weird feeling like I'm falling...what is it?

Question

I'll be sitting somewhere or lying in bed and after a while I'll feel like I'm falling down or being flipped sideways...what could this be? Is it normal?

Answer 1

it's called vertigo, and it could be the sign of low blood sugar, low blood pressure or an inner ear imbalance...  

Answer 2

you might be experiencing orthostatic hypotension.

it is a sudden fall in blood pressure when you lie down or sit.

Answer 3

That has happened to me before. I usually get the feeling a few hours or days before getting a fever.