John Edwards' Wife -- He Made Me Throw Up

John Edwards' wife, Elizabeth, hurled in the bathroom after learning about her hubby's affair.

Elizabeth has written a book, "Resilience," and the New York Daily News got an advanced copy. Elizabeth says John fessed up just days after announcing his run for Prez.

The buzz we're hearing ... John literally won't go out of the house these days because he can't handle the reaction he gets. And Elizabeth is still with him.