Managing Separate Art Styles?

This week has been a roller-coaster ride!! I was very fortunate to be accepted in to 3 art shows this spring. I'm so excited and nervous but most of all, happy! 

But I find myself questioning my art. I was accepted into those shows with my whimsical art.  I started making those as a "break" from my "serious" artwork.  I love making them, but I don't want to be known only for those works. 

Am I the only artist out there who has two very separate styles? And how do I successfully manage and market both? 

Would love to hear from others about this!!