How did I get sleep apnea? Can it be cured? What did I do to get this suddenly?

I was diagnosed with sleep apnea about 3 years ago out of the clear blue sky. I was 38 years old and never had any major health problems. From what I read it is hereditary but no one in my family has this. I hear it could lead to stroke, heart attack, etc. How in the world could such a disease just come out of the clear blue sky!!!! I am totally confused and need to know how to CURE this disease!!!!!!!!!