Hello there - we just got back from a RC cruise.  There wasn't too much swaying on the cruise ship.  Some a little on the first night we sailed, and a little more on the last night we sailed (last Thursday).  I didn't have any issues on the ship.  However, since being home I feel a little dizzy/off-balance.  Have you experienced this?  And if Yes - what do you do to combat it, or when will it go away?  Thanks.