Talk to Urologist on Frequent Urination

I had UTI 2-3 weeks back, after taking antibiotics it was settled, from the last one week I am facing frequent urination, in night 2-4 time and in day I am continually feeling urgent of peeing. A little burden on the testicles is also feeling and I am continually thinking about it, Sometimes it seems that it's a psychological problem. what can I do? I am so much worried, last year in July I had an ultrasound in which some sand in the kidneys was observed otherwise the prostate and other things were fine. please guide, I will be highly obliged.