UTI or pregnancy symptom?

Audrey • 31 years old. Mom of one little boy 👶🏼 with another bundle on the way! Happily married since ‘16 💏
I've been having to pee constantly today like 2x an hour. Theres no pain. How do I know if it's a UTI or just having to pee because I'm pregnant?? 
Edit I am 12 weeks pregnant but was wondering if it was just a pregnancy symptom or a UTI I have an appt tomorrow so will just have to see if it gets better or worse by then 😐