Burning sensation tmi info

Rana • Married a year and a half, pregnant with first child.
I woke up with a burning sensation like I was getting a uti. Now there's red blood in my underwear the size of two quarters and still pink when I wipe. Not sure if I should be freaking out or if it's a uti and causing bleeding which I never heard before. I'm at work now and debating leaving to go to the doctor now or just wait and see if it continues then go.