Pus cells in urine. But i am worried!

Urine routine shows pus cells - 11 Bacteria - present Then I did urine culture and the result shows no bacteria. I don't have symptoms of burning during urination. I get pain on pelvic area sometimes but I am not sure whether it is urology related because I keep getting such on and off pain due to gastritis and irritable bowel syndrome. My urologist says no need for treatment but I am worried regarding pus cells. I have started taking telma 20 for bp since 5 days. Is there a chance the pus cells came due to telma side effect? Because I have never ever had pus cells and even 2 weeks back my urine routine was normal. Sometimes when my bladder is full I get a pain on my urethra and then it goes away once I empty bladder. All other blood tests are normal. No protein in urine. I am confused about what to do . Hoping to get some suggestions.