hi doc, ive got urine examination several times, PUS cell on the 1st was 20-25, then i took cefilixine, 2nd was 15-20 pus cell then i took nitrofurantoin it becomes 14-16 pus cell. then i wondered why when i took ampicilin sulbactum it increases to 35-40 pus cells.. im so scared because im 24 weeks pregnant what can you give advice?