My 22 year old daughter has suddenly started needing to wee every 30 mins day and night. This has been going on for around 3 weeks. She is hardly sleeping and hardly eating. Has had 3 different lots of antibiotics, none of which made any difference, and last two urine tests showed no infection present. She is going mad with it and, after much googling, is convinced she will always be like this, and her life is ruined. Please, please tell me if you have any suggestions. Thank you.