Though Jenna Johnson is on television — she’s a pro dancer on Dancing With the Stars — she has some days where she doesn’t always feel her best self. “I had really bad adult acne a couple of years ago, and it was a terrible time for me. I hated going out in public, I hated doing interviews on-camera, I just didn’t feel myself or confident in my own skin. Now I am on the other side of it, and I still have little breakouts here and there and skin insecurities, but I feel like I have the tools and the knowledge necessary to know how to take care of it,” the dancer, 30, exclusively tells Morning H…