Deja Vu dream-recall followed by extreme nausea

Starting March of 2012, started having episodes of deja vu that were immediately followed by extreme nausea that would last anywhere from 30 seconds to 2 minutes. Then, gone. No headache or feeling of weakness....other than being bowled over with confusion and concern about what the hell THAT was.
Have had deja vu many times before, but this is different in that it is always a sensation that what I'm experience was in a recent dream. It's never a feeling of "I've been here before." Always feels like dream-recall, and while it's happening the entire dream comes back to me very clearly. While it's happening I almost always hear a song in my head associated with the dream, one that in that exact moment I think "aha! I know that song!" Then I realize what is happening and immediately throw up or barely avoid it by breathing slowly and deeply, and the memories that I had only seconds before of the dream are now extremely foggy. I can't remember the song either.

I'm curious if anyone else is experience this...and yes, I know some will say epilepsy but I don't believe it's that.

Thoughts?