Anak, please call your OB or go to the hospital right away, hindi dapat mag-decide ka lang on your own about antibiotic safety in pregnancy, lalo na at 39 weeks ka na and may recurring UTI ka. Your doctor needs to know about lahat ng antibiotics na ininom mo and the yeast infections so she can prescribe something na truly safe for you and baby at this stage. A few of my mum friends din nag-struggle with UTI towards the end, pero lahat sila nag-consult ng OB before taking anything, kaya please don't worry-worry nalang, get checked na ngayon para peace of mind mo and baby's safety. You're so close na! Sending love.