My midwife always suggests getting tested again at 39 weeks because it can come and go so you might not actually need abx if its no longer present.
^^^ Yep!
I think its about a 2 week time frame you are looking at with GBS So if you test positive that early you may not closer to your EDD. You are also entitled, should you choose, to do vaginal douches during labour if you do not want an IV or as previously said, nothing at all.
GBS is one of those things that you might have this pregnancy but not next time