Bladder infection like situation.

Hi, I had a bilateral DJ stenting with the right URSL done for an 8mm stone in my right kidney about two months back. I also have a 12mm stone in my left kidney, but I couldn’t undergo RIRS surgery for it because of my mom’s health issues. So I decided to remove the bilateral DJ stents a month back. So, Yesterday, I did an ultrasound test as I had problems with urination. I felt a burning sensation after urinating and I couldn’t hold my urine for long. I also felt that my bladder was not emptying completely and I had chills, body ache, and sharp pain in the left kidney and ureter area. The ultrasound report showed “debris noted in the urinary bladder”. The doctor who did the surgery didn’t answer my call, so I decided to consult online. The online doctor, who is a General Physician, prescribed me tab Zifi 200mg for 7 days and asked me to get a urine test done. Is it okay to take the medicine without a urine test report?