Jo Dee Messina's mom has suffered another setback. The elder Messina, who had open heart surgery in April, was diagnosed with pneumonia last week, and her condition continues to deteriorate.

“Another trip to the ER,” the singer shared on her Facebook page last Thursday (July 11). “We were at special care facility. Now back in hospital. Mom has pneumonia. 3 mos 2day since surgery.”

Later, she updated her loyal fans with the sad news that her mother's behavior had become erratic, and the doctors suspected an infection was causing the sudden change. She added that she has been spending most of her time at the hospital, and she was becoming exhausted by her non-stop schedule.

"I am not this strong," the married mother of two admitted on Facebook on Friday. "My body, emotions, every bit of me is exhausted. When my mother has been confused, I have tried to be her hope. Pushing, coaching, inspiring. I never thought at any point she would be where she is now. I am realizing that SHE has to have the hope and the will. I can't 'will' her better."

Read the full message here.

Messina, who recently raised over $100,000 through Kickstarter to work on a new album, still has several shows on the calendar, including stops in Louisiana and Mississippi this weekend. Keep track of all of her updates here.