I was born with VUR and was on antibiotics until I was 5 years old, since then I had around 10-20 UTI's a year but since january when I turned 19 I have had 9 confirmed UTI's ( white blood cells, protein and blood) and have been given antibiotics for them ( trimethoprim,amoxicillin, nitrofurantoin) along with the confirmed ones I have been experiencing all of the same symptoms; frequency of needed to go the toilet,pain when urinating and pain pretty much constantly on a daily basis, which I cannot always get to the doctors to have confirmed, I have had blood tests which came back negative and am having an ultrasound later this week, any ideas on what could be causing these UTI's?