The 36-year-old told the Sun newspaper she made the discovery that she was pregnant in the toilet of a supermarket after her husband Craig rushed to get her a test.The former prison guard was due to embark on her first tour later this year, but has said it will now be postponed until 2015.She explained: "I was really upset because I thought I'd let everyone at my management and the record label down."But they were really good about it. I was going to go on tour solo at the end of October - but I have managed to move it until January."Bailey said she has been supported by X Factor mentor Sharon Osbourne, but had not yet broken the news to new dad Simon Cowell.She added: "I hope I'll see him soon - I can teach him how to change a nappy."Bailey's debut album is due out later this month.