I ate an ice cream sandwich and it went away completley. I have come to teh conclusion, it is totally anxiety, hunger and excessive coffee (which I know isn't good for my anxiety, spare me the lecture and teh spanking ).
My friend experiences this very same sensation, it was diagnosed as anxiety and she was given a perscription to xanax which she now abuses
For people who are all about woooooah man, lighten up, everything in the world ever is funny and insults dont exist, you dont seem to have realised that that rainbow person was just trying to be funny. Failing of course, as usual To the OP it does sound panic attack/anxiety related. I feel what you described sometimes