Lily Allen has opened up about her pregnancy anxiety and her sleepless nights after previously suffering two miscarriages.

The Smile hitmaker was left devastated when she miscarried her unborn son with husband Sam Cooper six months into the pregnancy last October (10) - two years after losing a baby with ex-boyfriend Ed Simons.

Pregnant Lily Allen recently reached the six-month mark and admits she is plagued with worry for her unborn baby and for Cooper.

She tells London's Evening Standard, "I was terrified the other night in bed. I wake up a lot at the moment and at one point I touched Sam's face and it was freezing cold. I was screaming. 'Sam! Sam! Oh my God, my husband's dead! I've sorted everything out and now it's all over!' He woke up and said, 'All the windows are open.'

"After my... last baby, I'm being really closely monitored so I come to London every Thursday for a scan. The doctor keeps telling me to take it easy...

"Instinctively I always want to be involved in everything. But with this pregnancy, especially with what happened last time, I'm getting to the point where I think, f**k everything. It's the one time in my life I'm allowed to do nothing."