How To Be A Parent After The Kid/s Move Out...

Don't know my new role and how to parent someone who is not living at home. My only child moved out unexpectedly and recently and I feel that my role has completely changed and I don't know how to parent a young adult. (18). I am reeling from 'empty-nest, feel like she doesn't need me anymore and I quite frankly don't know what I'm doing as a parent- I don't know how to parent someone who is no longer living at home, is not phoning and doesn't seem to need me. Any help??? Suggestions? Words of wisdom?