Welcome. Bridgewitch, to the fibromyalgia forum! I do get lightheaded but not as dizzy as you do. I have been known to misjudge rounding corners and banging into them with my shoulders. OUCH! Not fun, huh.
When I was in college I got drunk a couple of times. (Be quiet, Marlee! ) Anyway, when I would lie down, the room would "spin". But, if I put one foot on the floor, that helped immensely. I'm not sure if that will help you but it might be worth a try. Hmmm...I didn't think those college days would ever come in handy!