Hi Iliketo well done on the thread title by the way.
Yes, I researched the GBS. I'm a library assistant so looking up info comes as 2nd nature 
A really good website is the GBSS here:
www.gbss.org.uk/index.php
where the info on there FAQ says:
Do I need antibiotics if GBS is found in my urine?
Yes, though remember to tell your health professionals if you have ever had an allergic reaction to penicillin or any other antibiotic. Urine is supposed to be sterile so, if GBS is found in your urine, you should be treated with oral antibiotics when diagnosed and this treatment repeated until urine tests come back clear. A 5-day course would be appropriate and it?s important the urine is retested 7-10 days after finishing the antibiotics.
Treatment for a GBS positive urine sample, whether you have symptoms of a urine infection or not, is essential during pregnancy since, if left untreated, such infections can cause kidney damage and have been linked to preterm labour.
GBS having been found in the urine during pregnancy means you should also be offered intravenous antibiotics once labour has started.
I also thought this was of interest:
Are the tests for GBS colonisation reliable?
The conventional tests available are not very reliable when they give a negative result ? they give a falsely negative result up to 50% of the time when they should be positive! On the other hand, if you get a positive conventional test result, that is very reliable.
Apologies if you're not interested in GBS that may have been a bit long winded.
I tested negative at the v. swab when PG with my first son. He was fine at delivery but was transferred to the SCBU after 24 hours and given AntiB's. He was fine after a few days but they couldn't pinpoint the problem. I've been wondering if this could have been GBS related?
I know it can come and go from your system but I'm definately going to make sure I get the AntiB's at delivery this time regardless of my V. swab result, although as I've has a + urine result think that they will give them anyway.