Toni Braxton made a name for herself with her voice, singing ballads like the 1996 hit "Un-Break My Heart" that cemented her status as one of music's biggest stars.

Now the singer says she may be moving on from the profession that made her famous.

"I don't feel the love for music anymore," Braxton, 45, said today on " Good Morning America." "It's not affecting me and making me feel that thing I always felt when I always performed."

"It's leaving me and I'm not sure what's going on in my life," she said. "I'm not sure but I'm a little angry. My heart isn't in it anymore and I hate to say that."

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The Grammy-winning songstress has had her share of setbacks in recent years, including twice filing for bankruptcy, despite $170 million in worldwide sales, and suffering from lupus, a hereditary autoimmune disease that killed her uncle and left her unsure if she'd be able to perform again.

Not long after Braxton was diagnosed with lupus, in 2008, she was also diagnosed with microvascular angina, a narrowing of vessels in the heart, which led to her being hospitalized for blood clots in December.

"It's a little scary. I'm going there thinking, 'Oh, it's just my heart a little…' and they're say, 'No, you have blood clots,'" she said. "Every day is a little challenging."

Braxton says she is now feeling better and, even with doctors' orders to slow down, she is taking on a new role, the lead in the upcoming Lifetime original movie, "Twist of Faith," in which she plays Nina, a singer in a gospel choir.

"What I loved about it, it was very me if I was not a singer," she said. "I went to college to be a schoolteacher. I'm a preacher's kid. When I read the script I immediately identified with her."

Braxton stars in the movie alongside veteran actor David Julian Hirsh, as well as a new, younger actor, who just happens to be one of her two sons, 9-year-old Diezel. (Braxton's other son is 11-year-old, Denim.)

"I was completely a mom," she said of handling Diezel on the set. "I was thinking, 'Okay did he brush his teeth? Did he get in the back and get his molars? Is his hair okay?'"

"I had to remind myself, 'Toni, you have to stay in character. Stop being Toni the mom,'" she said.

The made-for-TV movie marks the first leading acting role for Braxton, who for years has starred alongside her family in their WE reality TV series, "Braxton Family Values," where they are known for not holding anything back.

"We talk about what's going on in our lives and I think sometimes people forget, even though you're family, sometimes you don't like each other," she said. "But we dare to air our laundry."

Click HERE for a recipe from the Braxton family.