My 5 year old son makes a horrible evil when he pi...

My 5 year old son makes a horrible evil when he pips and escapes him, poor. We go to the pediatrician and tells him that he should take a sample of urine to fill the pot and then give him an antibiotic and tomorrow he will take the sample to analyze it. So far everything is right. When it passes through the counter to request time to analyze the urine, they give it time for December 3 and that the sample must be the same day of the analytical. We tell him that he is having it now and they give him up for Monday ... Should he be until Monday with this bad poor man, because the SS goes wrong? INDIGNANT