I have urinary tract infection and take antibiotics for 4 days. but after my ureter, urethra area feels uncomfortable. is it possible that i still have uti?

UTI treatment: Yes, you could still have UTI. Treatment usually is just a best guess about which antibiotic will be efffective. Perhaps your treatment was not. Contact the doctor or clinic where you were treated. At your age, and if you are sexually active, make sure you have been tested for common STDs. Gonorrhea and chlamydia can cause symptoms like UTI but need different treatments. Good luck.