Talk to Gastroenterologist on Urine Problem

I have been suffering from acid reflux due to anxiety and stress. My Gastroenterologist prescribed me Esocue, Pepcidine, Sulvorid, Pentoxol-M and Gaviscon for 2 weeks. 5 days of medication are left. Alhamdullilah the medicines have been working and I feel better. But since the last 2 days, I have been suffering from frequent need to urinate, almost every hour. And only a small amount of urine comes. Apart from this there is NO irritation or pain of any sort. Only this need to urinate frequently. I took Cran-Max one sachet today in the morning. My doctor recommended me to take Solifen 10mg for a few days after dinner. I just want to know if this is a case of UTI or just an overactive bladder? And should I take Solifen?