During the last month, I have gotten up to walk to the kitchen, etc. I suddenly feel dizzy with perspiration forming on my head, then I black out and fall down. That has caused me to bang my head open, bruises everywhere. I have fallen down at least 12 times and it is happening without warning. My legs go out and one or both of my arms acts spasmotic what can it be and what kind of dr. should I see.