'Real Housewives' star Teddi Mellencamp given '50/50' chance of surviving cancer

Finding the positive has been a challenge at times.

"I really like to have control, and this is completely out of my control. And for the first time, I’m really scared," Mellencamp said.

Her famous father, John Mellencamp. has remained a small, but assuring comfort during the process.

"Yesterday, my dad calls me 11 times in a row. Finally, I answer, I’m like, ‘I’m in the bath. Let me live a little,’" Teddi explained on her podcast "Two Ts in a Pod," which she hosts with fellow "Real Housewives" star Tamra Judge. 

"He goes, ‘I just want to make sure you’re going to be in our group family mausoleum.'"

Teddi's father, John Mellencamp, checks in on her over the phone daily. (Kevin Mazur)

She went on to say that she instantly thought of her three children, Slate, 12; Cruz, 10; and Dove, 5, and where they factor into the family mausoleum in Indiana.

He’s like, ‘Well, there’s going to be the top five and then we’re gonna have little areas around it, and then that’s where everyone’s going to get buried,’" she continued. "He goes, ‘You’re doing your will right now, so you may as well put it in there.’"

In the end, she said, "I think I agreed to be in the mausoleum," and joked that someone she met not too long ago inspired her to get "hot girls never die" put on her tombstone.

Mellencamp told US Weekly earlier this month that she's in the fight of her life after the cancer spread in her brain and to her lungs.

"I’m fighting for my life," Mellencamp told the outlet. "But also for my family’s life and all the people I love."

In February, after medication became ineffective for her migraines and Mellencamp began feeling severe pain, she rushed to an emergency room with her estranged husband, Edwin Arroyave. 

The "RHOBH" star is trying to "find the positive" during her cancer battle. ( JB Lacroix/WireImage)

"The pain had become something I’d never felt before," she said. "They diagnosed me with multiple brain tumors, but the [ER doctor] says he can’t take them out; they’ve got to get me into Cedars-Sinai [hospital]. 

"And I’m like, ‘Can’t you get me in tonight? I want to go tonight.’ I had six brain tumors and two lung tumors; they all came from melanoma that metastasized into these tumors inside of my body."

Mellencamp began radiation and immunotherapy treatment immediately after her surgery, which took a toll on her body.  

"I thought I was going to feel like how I felt after my neck lift," she said. "My reaction is always a headache, and I found out that’s good news because it means that the immunotherapy or the radiation is killing your cancer."

Teddi and estranged husband Edwin Arroyave put their divorce on hold to handle her health. (Rodin Eckenroth/Getty Images)

Mellencamp said on social media after undergoing both radiation and immunotherapy the day before that she feels "so tired and run down, but I know it's going to get better again." 

Something that everyone can keep in mind… I kind of thought that I'd already beaten it, and then, a couple days later, I found out I had four more tumors. So, there are so many different highs and lows, and yeah, but I've learned a lot."