I'm not sure exactly what is wrong with her, but Lacey wrote the song because she was so impressed by Layla (wife of Kevin Palmer of Trust Company) and how she remains so positive and hopeful in whatever her obviously hard life brings her.
"All my complaints shrink to nothing" Lacey sees that this person has huge obstacles in her life and her own, which are smaller fade in comparison. It's about taking what you have, no matter how small it may be, and being appreciative and happy for it.