A 32-year-old mother died suddenly after a serious heart condition went undiagnosed.
Hannah Button "lived for her children and animals", her mother Sara Higgins said in tribute ahead of her funeral next week.
The mother-of-two, from Beccles, died in July, with an initial post-mortem examination proving inconclusive.
Mrs Higgins, founder of the now-closed Blossoms Rescue Centre, said: "Hannah was animal-mad and was really concerned about their welfare from a very young age.
"She would help at Blossoms a lot, but her main job was a carer.
"All her money and time would go on trying to save animals. She wouldn't give up on them.
"She was young and liked to go out and have fun, so it was a shock to everyone.
"Sometimes we spoke about when I die, not thinking for a moment she would go first."
Miss Button found out her daughter was pregnant shortly before her death, but passed away before the birth of her first grandchild in September.
Mrs Higgins said: "We had no idea she had a heart problem.
"Looking back, she was always tired but she fought through it.
"She started having panic attacks which made her really ill afterwards.
"We had a celebration of her life in September because we knew there would be a long delay before we could have her funeral when the post mortem came back inconclusive."
Further tests were carried out and it was ruled "highly likely" Miss Button suffered a hypertrophic cardiomyopathy and granulomatous myocarditis.
Mrs Higgins added: "They believe it caused a fatal cardiac arrhythmia, but thankfully she wouldn't have known anything about it.
"They've asked her family to be tested for it because we had no idea at all.
"She wasn't terribly good at going to the doctors and thought she would be ok.
"If her story makes one other person go to the doctor then it is worth sharing because I wouldn't want any more families to go through this."
A funeral is now set to take place at Worlingham Church on Wednesday, November 30 at 1pm.
Her daughter will ride a pony behind the hearse, while her last rescue dog Nellie will be amongst those in attendance.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here