Urinary infection. Gave us zifi syrup.

Hi, my son is 1 year 10 month. past two days, he was crying before peeing. yesterday morning we went to doctor and took urine test. doctor told that he have sign of urinary infection, and gave us zifi syrup. yesterday we gave lot of liquid, especially coconut water and barley water. his urine output was 4-5 time/ per hour. the pain stopped. night he didn't pee for 2 hour. after than when he pee, he got pain.. then pain gone, once he started to pee every half hour. but the fever was spiked. 102.5. morning we covered him wet towel gave Parcetomol, food and zifi. the fever came down. 1.he is well active 2. he didn't get pain, if he continuously pee every half hour. 3. fever comes when he didn't have intake for 2 hours.