Jade Goody was apparently taken to London’s Royal Marsden Hospital at the weekend after falling ill at home.
The reality star, who is battling cervical cancer, is said to have fainted after her latest session of chemotherapy.
‘Jade has gone through an awful few days and has been very ill,’ says a source.
‘She collapsed at the end of the week and had to go back into hospital.
'She is a fighter, but the treatment has just taken everything out of her and she has been in excruciating pain.’
Jade, 27, is determined to recover from her latest setback in time for a ‘welcome home’ party for boyfriend Jack Tweed, 21, who was released from jail last week.
‘She has been in a lot of pain and she is going through hell,’ her spokesman Max Clifford tells The Sun.
‘It is a battle for life, but her condition has not worsened and treatment is ongoing.’
See how the Duchess of Cambridge's hairstyle has changed over the years...
Presents to please your man on 14 February
TV star steps out in style
There's a real buzz about the beauty product the stars swear by…
A look at our favourite finishing touches at the National Television Awards in London
Presents to please your man on 14 February