Mama, please check with your OB muna before taking any herbal tea or supplement, even the "natural" ones, kasi buntis ka na at 32 weeks na. Hindi lahat ng herbs ay safe during pregnancy, kahit commonly used sa bahay.
A few of my mum friends actually had UTI concerns rin during pregnancy, and their doctors prescribed specific safe options for them instead. Better to ask your OB directly about what's okay para sa iyo at sa baby, they know your health best. Wishing you a safe pregnancy, mama!