Such an important, and often neglected part of this process! Acknowledge the feelings you have about facing this tough circumstance, seek help in the form of professional counseling if necessary, and reach out! There are countless support groups face-to-face or even online. If you don't take care of yourself as a parent, you will not be able to be there for your teen.
Here's a great place to start:
http://bit.ly/1AeE0WE