Possible UTI

Has anyone had any issues with UTI's during this pregnancy? I'm 19 weeks 3 days and last week they thought I had one at my dr appt but did a culture and came back good. Two days ago I started bleeding when I peed and had to pee as soon as I already peed. I'm still having these issues the bleeding comes and goes and my dr's office said I'd have results yesterday now it's not til Thursday or friday but if it comes back I dont have one they probably won't give me any antibiotics and I just don't know what else to do. I was just wondering if anyone has any tips to help get rid of whatever is going on. I am drinking water and cranberry juice and it doesnt seem like its helping any yet.