Twain, 45, stopped performing in 2004 after her husband ran off with her best friend.
“It was the most miserable time in my life but I have to get past that,” the Grammy winner told US TV show Why Not?
“This journey is about facing my fears, facing things that would be easier to run away from,” said the Up! singer, who has struggled with anxiety since Mutt Lange had an affair with her pal Marie-Anne Thiebaud.
Twain said she wants to “step out of the suffering and the grief”.
“I can’t bring my parents back, I can’t get certain aspects of my childhood back, I can’t fix my marriage those things are out of my control and they are gone and now I have to concentrate on how it affects me. My marriage fell apart and a friend I thought I could trust stabbed me in the back … I want to get over all the negative feelings.'