Job changing and interviews.....how do you deal?

I've recently been interviewed for a job I've always wanted. They stayed it was the start of their interviews so not to panic if I don't hear from them for a bit. But.....im in a state of panic xD

I'm so excited for an opportunity that I feel like it'd be a huge hit of sadness to get declined. I'm desperately trying to get out of my current job due to the unliveable work hours....basically on call every day. Some weeks 55-65 hours a week with subpar pay for the skill set. It's caused relationship problems, life problems, emotional problems. I feel like I'm not living life.

How do you guys deal with job swaps and rejections from dream jobs? How do you deal with work life balance for unmanageable jobs?