Hate my doctors office

I went yesterday because I thought I had a uti it came back positive  they told me they'd call me today when they send my prescription over to my pharmacy  I'm now experiencing lower back pain  I'm thinking due to the uti  n they've tellin me I have to wait til the results come back so they can send it over, I think I may just go to the hospital I'm so nervous about this uti n being pregnant  I wanna start taking something immediately smh