I often feel dizzy/unsteady, when i'm standing, sitting and when i'm lying down & when i look up, then look back down. what can cause this?

Dizzy spells: Dizziness or vertigo can be caused by several factors from low blood pressure to middle/inner ear disease. You should definitely schedule an appointment to be evaluated with a Healthcare professional especially if this a sudden onset and/or getting worse, associated with syncope or blacking out, headaches, waking at night, nausea/vomiting, etc. Good luck and God bless!