MTV star Diem Brown was cancer-free for five years.

“I thought I was golden," she says. "I thought it was never coming back."

But this week, the 30 year old announced that she is battling ovarian cancer for a second time.

Brown shot to reality-TV stardom after appearing on MTV’s hit series “The Challenge.” She jumped from insane heights, ate bugs and romanced the show’s notorious bad boy just one month after beating cancer.

She admits she was “shocked” to receive the news that years after getting one ovary removed, she now has cancer in her remaining ovary.

“I started feeling pain in my stomach.” Brown says. “I thought I was crazy -- that I was a hypochondriac. I put it off, but months later, I just knew something was wrong.”

She is currently working with a New York City-based doctor to freeze some of her eggs before her ovary is removed, but continues to focus on staying positive with the possibility of having kids.  

Brown was 22 when she was first diagnosed with cancer. While most young women her age peruse bridal and baby registries, Brown was in the hospital having chemotherapy. That inspired her to start medgift.com, an online registry for sick hospital patients.

She says her circumstances “aren’t normal” for someone in their 20s, going through chemo and menopause, but continues to be optimistic.

“I beat it once,” she stated. “I can do it again.”

Watch the interview on HLN’s Dr. Drew Thursday at 9 p.m. ET.  Also, follow the show on Twitter @DrDrewHLN.