What Blueberry said. Your body needs time to recover, but you'll get back to your old form in time.

For as strong and positive as you've been, I have to wonder whether you have processed through perfectly legitimate feelings of fear and sadness, too. Remember that it's okay to feel all that you're going to feel. It's not a sign of weakness or defeat. So have some good cries. My guess is that they'll be cathartic.