Sudden urge to pass urine with discomfort, even after small drops, usually points to a urinary tract infection, and Zenflox is a reasonable antibiotic choice for that. The electric type sensation is less typical of a plain infection and is worth mentioning at your follow up.
Next Steps
Finish the full course of Zenflox even once you feel better, and drink plenty of water through the day. If the urge or the odd sensations haven't eased in 2 to 3 days, go back to your doctor for a urine test to confirm the infection has cleared.
Health Tips
Seek care sooner if you develop fever, back or side pain, or blood in your urine, since that can mean the infection has spread higher up.