I'm 17 weeks pregnant, and have had mild symptoms of a urine infection since the beginning, but the first time my urine was tested, it was negative of all bacteria.
2 weeks ago, it was tested again and I was told by my midwife that it was positive for group b strep, and that was probably the cause of my symptoms. I made an appointment with the dr but was told by her that there was no point treating it as it "stays in your system forever"...and that it probably wasn't causing my symptoms 
She gave me a 3-day course of antibiotics which she referred to as a trial, but didn't seem convinced it would serve any use. Is this normal procedure?