Fallon Devaney, 25, is in a coma after being rushed to hospital.
She is also now fighting pneumonia, but staff believe the baby, due in April, may be sapping her strength.
Yesterday Fallon's mum Linda Fearney, 46, said: "I was taken aside by a doctor and told that either Fallon, the unborn baby, or both of them could die.
"The baby is taking a lot of her strength. The doctors have said they might need to do something about it to save Fallon.
"They can induce the baby but it is unlikely to survive.
"But if Fallon can't fight, then we have a very hard decision to make."
Fallon - who has a five-year-old girl Demi, son Jordan, four, and daughters Alyssa, three, and Lauren, two - was taken from home in Kirk Hallam, Derbys, to the Queen's Medical Centre in Nottingham on Tuesday.
She had not received the seasonal flu jab, which also guards against swine flu.
Linda said: "All pregnant women should be given the vaccine. If Fallon had it she would not now be lying in a hospital bed almost dead.
"She is on a ventilator. The doctors can't tell us how long she could remain in the coma so we just have to take it day by day. We're in a living nightmare.
"People seem to think it's only old people who suffer from swine flu but it's the young as well."
Dr Stephen Fowlie, Medical Director at Nottingham University Hospitals NHS Trust, said: "We encourage all people in at-risk groups to have the seasonal flu vaccine, including pregnant women. They should contact their GP for more advice."
And the Government's Chief Medical Officer, Prof Dame Sally Davies, said: "It is particularly important for pregnant women, no matter what stage they have reached, to get their free flu vaccine as soon as possible."
Meanwhile it emerged that parts of the North were suffering a shortage of swine flu anti-viral drug Tamiflu because of distribution problems.
NHS chiefs said the problem was temporary.
| Posted: at | |
narizenom
giftmurphy
TRENDING GISTS 
Lawyers Threaten To Sue IGP, Kayode Egbetokun Over Alleged Harassment Of Colleague
Wizkid Becomes Most Certified Nigerian Artiste In South Africa
VIDEO; Weird Moment Single Lady Proposes Marriage To Herself
BREAKING! Fire Outbreak At Dangote Refinery in Lagos (Video)
SAD; Six Students Drown In Mbang, Kaduna River 
Gov Sanwo-Olu Congratulates Davido And Chioma On Their Successful Wedding, Shares Lovely Photos