Well Kate, I don't want to worry you but I had a recurring UTI in 2009, that lasted from May to November and no amount of antibiotics would get rid of it. It would go away while I on antibiotics but the infection would return within a few days of me finishing the course. I must have had at least 15 courses of antibiotics! My symptoms included frequent urination, burning sensation when urinating, foul smelling urine, night sweats/chills, loss of appetite and inability to keep anything down and general feeling of being unwell. In the end my GP referred me to a Urologist and long story short, it turned out to be kidney stones (nasty things!). I agree with what others are saying, you need to get a sample of urine to your GP asap so they can determine the cause. Hope you get well soon.