Thank you for the query.
Lac of white blood cells in the urine does not rule infection out. It looks like given antibiotic were not effective. In such case urine culture test is necessary and depending of the results, proper antibiotic prescribed.
Your intestinal problems are cause by antibiotics intake. Due to its effect on intestinal bacteria, you have naked intestines without protective bacteria. This allow bad bacteria to grow and cause diarrhea
. Moreover, diarrhea due to dehydration
can trigger urinary tract infection
I suggest you to visit your doctor, have urine culture test and proper antibiotic prescribed. In a meanwhile please start probiotic
intake, cranberries supplements. If diarrhea wont stop, consider Rifaximine treatment.
Hope this will help.