Sayang, sakit pinggang balik especially after UTI yang baru okay, this needs a doctor's check, okay jangan delay. Could be infection not fully cleared or something else, tapi kita tak boleh guess-guess. Please go see your GP or clinic asap, jangan tunggu worse, UTI boleh jadi serious kalau tak handle properly, especially kalau kencing sikit and sakit. I know ada anak setahun, tapi your health is equally important untuk dia. A few of us mommies pernah kena similar, and honestly, early check-up saved us from being warded again. Jangan risau about going back, better safe than sorry, right? Go check, okay?