Frequent urination. Overactive bladder!

For the past day, I have been experiencing frequent and uncontrollable urination. I have needed to urinate 4–5 times within a interval of just 2–3 hours during the working day, and I find myself unable to control the pressure of it. Each time I urinate, I feel some relief but also a burning sensation, sometime it is stronger. Along with this, since yesterday I have been feeling dehydrated, yawning excessively, and experiencing frequent hiccups and burping despite drinking a large amount of water. I also feel nauseous. In the last five days I started taking two psychiatric medications prescribed by my neuropsychiatrist: Samzep 0.5 and Fluoxetine. Yesterday, I also had excessive acidity and a sensation of internal heat, which made me drink even more water than usual. My kidney functions well since in a year i took twice usg, kft test. Apart from the recently started psychiatric medications, I have no prior history of taking other drugs. My concern nightlife,psycrt drug,overactive bladder