i am 15 and going through my last set of gcse's and im worried the invigalators will not let me to go to the toilet. Because for a few months ive had the urge to urinate every hour i went and got my urine sample and blood sampled but everything came back completly clear and i believe i have a urine anxiety problem? but im worried they wont let me go to the toilet and i might pee myself during the exam. does anyone know how to help this, much appreciated.