Coronation Street's Sue Cleaver was left 'mortified' after an unfortunate slip-up during a visit to a pharmacy.The 60 year old actress took to Instagram to share a video as she explained that she'd accidentally asked for medicine to help with an STI (sexually transmitted infection) rather than a UTI (urinary tract infection). In the clip, Sue laughed as she said: "Can’t believe I’m actually sharing this. "I had to go to the pharmacy and it was busy and there was quite a queue behind me.