Nah! By shania-What does this part of the song mean?

yay im so happy! i love shania twain! haha okay umm i have thought about this part a lot too because the whole song is saying how she is glad he's gone. ive always thought of this part to be like the truth within the truth. the first part of the song (you wont find me naked and cold justa sittin on the doctors table) says that she is strong enough to deal with what happened on her own. The second part (waitin to be told justa why im no longer able to feel my heart beatin give me a good reason why) is saying that her heart is broken but she knows exactly why so she doesnt need to wait around and be sad about it.