Ay, mama, spotting sa pregnancy ay dapat i-check ng doctor agad, lalo na if may doubts ka, better safe than sorry talaga! Hindi ko makakapag-diagnose kung ito UTI o something else, pero ang galing mo na nag-ask kasi kailangan mo talaga ng professional check, hindi lang assumption. Call your OB or go to the ER kung urgent ito, okay? Seryoso lang, at 27 weeks, importante na malaman agad kung ano ang happening. Take care, and let us know how you're doing!