Bladder infection 31 weeks - possible GBS?

Melissa
I was just told I have a bladder infection and need to go on antibiotics to treat it. I have no real symptoms which I guess is common. The urine test was strictly for bladder infections but my midwife was explaining that when you get a uti in pregnancy the likelihood of Group strep b is higher and that I'm likely positive for it - (I may however misunderstood). In any event I can still do the swab at 36 weeks to either confirm I have it or hopefully that I don't have it. 
Just wondering if anyone else has experienced this? A UTI this late in pregnancy that lead to GBS positive results? 
FTM and obviously worried by the news. 
Thanks ladies!