A four-year-old girl is being hailed a hero after she helped paramedics locate her mum when she collapsed at their family home. 

Jessica Jenks, of Hundon, near Haverhill, has been experiencing heart palpitations, the cause of which is still under investigation, and fell unconscious while at home with her three young children on Wednesday. 

The 25-year-old's eldest daughter Harper, four, quickly sprung into action, bringing Ms Jenks' phone to her side so she could dial 999.

"It was just a normal morning, I felt fine, but then I was making my two-year-old a drink and all of a sudden it felt like my heart was pounding out of my chest and the room started spinning and I just collapsed to the floor," Ms Jenks said.

"I remember coming around, I don't know how long I had been unconscious for, but I could hear my five-month-old baby screaming.

"I remember Harper coming over and putting my phone in my face. I dialled 999, said 'ambulance' and gave my name but then I passed out again." 

With her mum unconscious, Harper then managed to guide the ambulance crews to her house, explaining the colour of the door, house number and local landmarks, to get her mum much-needed medical attention. 

"The paramedics said that she was amazing," she said.

"When the first responder arrived on the scene she let them in and then she said she 'had to look after the kids now'.

Jessica Jenks was taken to West Suffolk HospitalJessica Jenks was taken to West Suffolk Hospital (Image: Newsquest)

"She sat my two-year-old down on the sofa and stroked their head and said mummy's going to be okay. She gave my five-month-old a bottle. 

"I feel very proud. Even the paramedic said if she didn't manage to get that phone we don't know what would have happened. 

"They said 'that little girl just saved your life.'" 

Ms Jenks, who was already taking medication for the palpitations, was taken to West Suffolk Hospital in Bury St Edmunds by ambulance where she said they originally thought she had had a heart attack.

She is now set to undergo three days of monitoring in an effort to get to the bottom of the problem.