I know you guys aren't doctors, but whenever I get up, my eyesight goes black/really fuzzy. It's really hard to see and my head feels light too. What could be a cause of this? I'm always hydrated by the way!

Your blood pressure is dropping, plain and simple. Try changing positions slower. If it doesn't help, you need to talk to your doctor. This is called orthostatic hypotension, which simply means low blood pressure when changing position from lying to sitting to standing.

My first thought is blood pressure... If you are 'always' dehydrated, then what are you doing to remedy that. Seems like an easy fix.