Both my wife and I are experiencing the same exact symptoms. This is our fourth cruise and have never had an issue before. We took the Carnival Breeze, their newest ship for a 6 day. My wife's dizziness started after she took her first shower once home. I laughed at her. Just took a shower this morning, and felt it start then...should have stayed dirty! I am trying some Sudafed hoping it ties in to sinuses and ears. I noticed on the ship my left ear hearing coming and going on the last day at sea. No dizziness on board, and never had, but the sea was a little rough and the wind was always ~30 knots. Hope it goes away soon. Good luck with yours! Keep us posted!