A mother from Derbyshire hospitalized with a breast infection died a few days later.
35-year-old Alison Powell passed away last week with her loved ones.
Her unexpected death comes just weeks after complaining of fatigue and flu-like symptoms.
Langley Mill's mother began to lose weight drastically in early June and spent most of her time in bed.
Her condition confused the doctors, who continued to prescribe strong antibiotics and inhalers to relieve her pain.
She was taken to Nottingham City Hospital on August 2 by her husband Andy, who no longer saw her suffering.
Her family said that it turned out to be sepsis and pneumonia.
Tragically, her liver and kidneys failed and she died only four days later on August 6. She left the 16-year-old son Ryan.
Ms. Powell's mother, Julie Walker, says she has difficulty settling for the death of her firstborn child.
Langley Mill, aged 53, said, "We are totally shocked that I, her husband and her best friend were with her at the time.
"We spent the whole night with her, I'm just devastated.
"It went downhill a few months ago, she felt exhausted.
"She dragged herself out of bed for her son's prom – she would not miss her son's prom for the world.
"I think it has not quite hit him yet, he's behaving normally around us on his Xbox.
"I think deep inside he holds everything tight."
Ms. Powell was known to have previously worked as a volunteer at the Barnardos Charity Shop in Langley Mill.
She had suffered from pneumonia and had a lung biopsy in 2018, but it was thought her health had returned to normal.
Her mother continued, "She recently got a job as a caregiver at Alexandra House in Eastwood and was thrilled.
"She had many friends, she was a devoted friend, wife and mother.
"We have always said that you are in Alison's life, whether you like it or not. She only loved friends and family. She would not harm a fly.
"I can not get over that we will not see her anymore."
A crowdfunding site has been set up to collect £ 2,000 for the funeral of Ms. Powell.
Anyone interested in making a donation can follow the link here: https://www.justgiving.com/crowdfunding/kim-makinsey