The 59-year-old shared the update with her followers on Wednesday by sharing a photo of Jaimi with tears streaming down her face. She wrote, "I’m in hospital. It’s day 5 after coming in with chest pain, a wide squeezing band around my chest and back.
"All my tests are good. Everyone is stumped. But you can’t test for heartache."
Jaimi died in September last year after a battle with an unnamed long-term illness, with Lisa later revealing Jaimi had been diagnosed with a ‘chemical imbalance’ as a teenager.
Lisa continued, "For every beautiful photo of our girl, there are 10 sad ones. As I lie here thinking about our Jaimi, I wanted to show you how much she hurt too. Broken hearted by things that people said to her and did to her.
"Words and actions hurt people so deep that they store that trauma for such a long time. Some people can get through it.. some live with it, some just can’t."
She added, "There are many people, like Jaimi, who are beautiful, soft, fragile, sensitive, and are taken advantage of, their trust misused and abused. There are some really questionable people who take advantage of others who are fragile, who go on to live their lives not having a clue the damage they’ve left."
Speaking of the stages of grief, Lisa said, "You don’t go through each one and tick it off - they overlap, they come and go constantly.
"It’s hard, but you do start to work through them. I’ve found that writing things down is helping. People reaching out to me, although hard, is also helping… because we’re not alone.
"You never know what will trigger the heartache, or the tears… it could be a word, a thought, a song, a photo, a memory, a hug from a stranger… all we need is a hug… and understanding… nothing even needs to be said.
"I now know that every second person you see is grieving in some way so always be kind to others."
Lisa finished by saying, "To those grieving, I hope you are ok and that you also can find beauty and love in the sadness. Be not burdened with times of sorrow, I wish you the sunshine of tomorrow."
She added that anyone feeling any sort of chest pain should always call 000.
Lisa's son Jett Kenny commented with two love hearts with many others also sending their support.
"My heart breaks for you too," one user wrote. "Such a raw, honest post. I see you. Sending love and strength."
"Love you Lisa, praying for you too," another added. "Sadness can do us in, just keep hoping. Thank you for the words you speak on behalf of all in pain...your daughter was a beautiful soul."
"Some of the deepest, truest, and most sincere words I've ever heard," a third wrote. "Sometimes the hardest thing is checking in on our own selves. I wish you, too, the sunshine of tomorrow."
Earlier this year in a column for The Sunday Telegraph, Lisa said she's been left so broken after her beloved daughter's death that "some days it’s just plain hard to get out of bed".
"It’s overwhelming. It’s never-ending. I’m tired of being tired. I’m tired of being sad and exhausted. I’m sad that the fun in my soul has disappeared," Lisa wrote in her column.
Lisa often shares photos of Jaimi on Instagram, recently celebrating what would have been her daughter's 34th birthday.
"Our beautiful Jaimi, born at 9.03am, 34 years ago," she wrote. "Today is a hard day. I can’t even explain how I feel. I have no words. Happy birthday Jaimi. We all miss you and love you greatly."
In January, Lisa revealed the tragic words doctors told her just before her daughter passed away.
"4 months ago, the doctor gave us the news we had dreaded for years, that Jaimi would not survive the night," Lisa wrote in a heartwrenching Instagram post.
"It was like they just ripped our hearts out. Total disbelief ... and even though we had prepared ourselves for the worst for weeks, months and even years and thought we were prepared... nothing... absolutely nothing prepares you for that moment or those words.
"Our beautiful girl couldn’t beat the enemy... but she fought and fought.. every single day. We miss her so much.
"If you are finding life difficult, please seek out help. Don’t wait and don’t try and do it alone... remember you are loved and there is hope."
Mental health support for yourself or a loved one can be found by calling Lifeline on 13 11 14, Mensline on 1300 789 978, or the Kids Helpline on 1800 551 800. Online support is available via Beyond Blue.
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