What is the average life expectancy of some one with cardiomyopathy?

I am a 22 year old female and I have recently been diagnosed with cardiomyopathy. Over the past few days, I have been experiencing heart failure. I have not talked to my dr much and he's not being very straight forward with me...I would like to have at least an idea of what my life expectancy is...I know there is no precise number....but some one help me,,,,, please