The vocalist, married to her band mate Chris Tyrell with a 2-year-old little girl named Eisele Kaye Tyrell, got candid about going through the hard situation in the fall of 2015.
"This is something that's not talked about very often," she explained. "I also feel like there's this pressure that you're just supposed to be able to snap your fingers and continue to walk through life like it never happened," she added.
In order to help her cope with the pain and get her message across, Hillary decided to put her feelings into a new album of hymns, called "Love Remains."
She composed the new music while deep in the emotions of her miscarriage. One song in particular, "Thy Will," was written when she was in the, "most raw place that I could've ever been when this song truly poured out of me."
It's not just her songs that have helped the 30-year-old get through her hard times. She also has her adorable daughter Eisele, who she has an even deeper appreciation for these days.
"I'm a different mom to her now," Hillary gushed. "I hug her a lot tighter."
Check out Hillary's new record "Love Remains," out on July 29.