Olivia Newton-John's daughter Chloe Lattanzi says she has 'not been OK' since mom's death

Chloe Lattanzi, the daughter of Olivia Newton-John, continues to grieve the loss of her mother.

In an Instagram post Saturday, Lattanzi told her followers that she has "not been OK" since her mother's death. Newton-John, famous for her iconic role as Sandy in the musical film "Grease," died in August 2022 after a yearslong battle with breast cancer. She was 73.

"If I have forgotten to return your calls, I've had extreme memory loss," Lattanzi began. "I've had difficulty getting out of bed. I've stuck to my commitments, but I've been neglecting myself."

"One of my mom's biggest messages was take care of you," she said. "If you don't take care of you, you cannot give your full capacity of love, wisdom, kindness, and power to everyone else."

Lattanzi, who said she is planning on participating in Olivia's Walk for Wellness -- an annual 5K walk in Melbourne, Australia, aimed at supporting those with cancer and raising money for wellness programs -- said she will "disappear for about three weeks just to honor my mind, body, and spirit" following the Oct. 8 event.

"I'm developing a little bit of health issues in my mind and my body," she said. "I just wanted to say to anyone who I have been inconsistent with, I'm so sorry. I haven't been consistent with myself. And I haven't been taking care of myself."

"So, in the spirit of my mother and the spirit of the wellness walk, I'm going to take a month to do that so I can be of complete service to everyone else," she added. "If you needed this reminder, I hope it was helpful."

In a second video, Lattanzi thanked her followers for their support.

"Not many people are as blessed as I [am] to receive the kind of support that I am privileged enough to receive," she said. "Thank you to all of you."

Mental Health America says mourning after the loss of a loved one is a natural process that may last months or years.

Physical symptoms that can accompany grief include stomach pain, loss of appetite, intestinal upsets, sleep disturbances and loss of energy, according to Mental Health America. However, doctors say symptoms that persist for more than a year may be a sign of developing mental health disorder and should be addressed by a specialist.

The American Psychological Association says one of the ways to cope with the loss of a loved one is to take care of yourself.

"The grieving process can take a toll on one's body," the APA states. "Make sure to check in with your loved ones and that they are taking the necessary healthy steps to maintain their health."

If you or someone you know is in crisis, free, confidential help is available 24 hours a day, 7 days a week. Call or text the national lifeline at 988.