Anna “Chickadee” Cardwell, the oldest daughter of reality TV star Mama June Shannon, has died. She was 29.

Shannon, 44, announced the news of Cardwell’s death through a post shared on Instagram Sunday.

“With the breaking heart, we are announcing that @annamarie35 is no longer with us,” she began the caption of her post alongside a family photograph. “She passed away in my home last night peacefully at 11:12 PM.”

“She gave one hell of a fight for 10 months she passed away with her family around her like she won’t and we will will be updating y’all with more information as we get it today,” Shannon continued.

“We love y’all and continued prayers and thoughts for our family doing this difficult time,” she concluded.

Cardwell’s death comes after Shannon shared a plea on Instagram on Friday, asking followers to keep her family in their thoughts.

Cardwell — who appeared alongside her mom and sister Alana “Honey Boo Boo” Thompson in TLC’s Toddlers & Tiaras and later, Here Comes Honey Boo Boo — was diagnosed with stage 4 adrenal carcinoma in January and had been undergoing treatment at the time.

“Y’all we r asking for prayers for our family as we are going through this process we really appreciate y’all for all the thoughts and prayers and we will update y’all whenever we can just know that all of your thoughts and your prayers are very much appreciated during this time,” Shannon wrote in her post, adding the hashtag “#CancerSucks.”

Shannon’s 23-year-old daughter, Lauryn “Pumpkin” Efird, reposted her mother’s request on her Instagram Story the same day, adding her own message: “Say a prayer for our family.”

Cardwell’s doctors discovered cancer in her lung, liver and kidney following a series of tests after she complained about experiencing abdominal pain. She underwent her first round of chemotherapy in March.

Cardwell gave an update on her treatment on May 10 in an Instagram post, sharing that she was in the middle of her third round of chemo.

“This [was] yesterday,” she wrote alongside a photo of herself and her boyfriend Eldridge Toney. “It was pretty good day but did get a little and Cracker Barrel was good going down but not up 😂 but over all it’s going good and chemo is working we come to find so things are looking good.”

Earlier the same month, Shannon opened up to PEOPLE about how she was feeling “emotionally drained” amid her daughter’s illness.

“I don’t go live [on TikTok] a lot because of Anna. I’m already emotionally drained because of that,” she explained at the time. “I’m not being mean with the emotion… I’m not mentally [or] emotionally prepared to deal with 5,000 people asking me about Anna that day.”

She added of Cardwell’s cancer diagnosis: “You don’t know whether to scream. You don’t know whether to laugh. You don’t know whether to holler. You don’t know who to blame.”

Shannon also revealed to PEOPLE that she and her husband, Justin Stroud, were in the process of leaving Alabama to move to her native Georgia, allowing her to be by Cardwell’s side to help her through her treatment.