Last night I would wake up from extreme dizziness and nausea. The spinning would go away after about 15 seconds. I also have a headache behind my eyes?

Possible BPPV. Awakening from sleep with dizziness and spinning enough to cause nausea and/or vomiting can be caused by positional vertigo. This disorder arises from movement of your ear rocks (otoconia) into the semicircular canals leading to a sense of motion without actually moving (vertigo). Either an ENT (ear nose and throat specialist) or neurologist will be able to diagnose and treat this condition.