I'm 28 weeks pregnant and been driven mad by thrush. I saw the midwife yesterday when it wasn't too bad and she told me to get Canesten cream and come back after the weekend so she could take a swab. I got the 1% cream but it has got worse since yesterday. I have a tube of 2% cream that is well within the use by date but it has been open for months. Would it be safe/effective to use now? Thanks