Sarah Harding is said to be stressed as she waits for the results of her skin cancer tests.
The Girls Aloud singer had three potentially cancerous moles removed from her back on Wednesday, just two days before she attended a huge press conference with the rest of her bandmates to announce their comeback.
The 30-year-old will find out this week if she has been diagnosed with the disease, and sources close to the star say she is, as expected, going through a difficult time.
"This is an incredibly stressful time for her," a source told The Sun.
"It’s early days and the doctors are very positive — but the word ‘cancer’ is terrifying to hear and Sarah is naturally stressing about it."
"The girls are completely behind her. Some of the fans have suggested she hasn’t been enthusiastic about the tour, but the girls have told her not to stress because she’ll only run herself down and make herself sick," the insider continued.
Sarah is gearing up for the release of the girls' tenth anniversary celebratory album Ten next month, in addition to their upcoming 2013 tour.
Fingers crossed for Sarah!