The Girls Aloud star, 29, was treated for alcohol abuse and depression after calling off her engagement to DJ Tom Crane, 31.
Sarah and Tom were due to marry next summer after getting engaged this New Year.
'They've been in regular contact throughout her time away but only on the phone. They've spoken most days and it seems like they could have a chance of giving it another shot,' a source tells the Sunday Mirror.
Sarah's ex Calum Best, 30, is glad that Sarah got professional help.
'Everyone has their dark times, but Sarah's strong and will come out of this period even stronger, he told us last month