Why does the urinary frequency increase when I am stressed?

Hi doctor,

I have been experiencing frequent urination since last month, which usually occurs when I am very stressed. My father has suffered from bladder cancer because of his smoking habit, which made me anxious. On consultation with a doctor, I was prescribed antibiotics for UTI. I got better with the medication, and the symptoms almost disappeared. But this week, I am suffering from the same problem as I am very stressed again these days. The frequency of urine depends on my stress level. However, the texture of urine is very clear and of normal color. But I can feel some pressure in my pelvic region, which is not hurting. I had undergone surgery for a kidney problem approximately twenty years back. The problem detected was with canals. I had follow-ups with ultrasounds, and everything was normal when I got it done two years back.