Causes of Vertigo. Vertigo is often caused by an inner ear problem. Some of the most common causes include: BPPV. These initials stand for benign paroxysmal positional vertigo. BPPV occurs when tiny calcium particles (canaliths) clump up in canals of the inner ear.
I think the pain is worse at night because of the activity during the day. I do experience pain at night (and throughout the day off & on). It makes it hard to go to sleep at night plus in the middle of the night the pain wakes me up.
I do not know your age, but cramps in the feet while sleeping at night is apparently fairly common as people grow older. It is believed that this is sometimes caused by poor circulation in the feet, and is more common in diabetics than in other people.