I have been GBS+ both my previous pregnancies and kind of assume I will be again. I did a high protein low carb no sugar diet with my second pregnancy (diet-controlled GD) and took lots of probiotics. Still tested positive. My HBMW for that pregnancy wasn't particularly worried (her point is that you always have to watch newborns for infection, regardless of GBS status) but we were planning to use hibiclens rinse if I had PROM, long labor, etc. I did not (water broke about 15 minutes before baby was born, whole labor under 3 hours). However, I had no internal exams at all, in order to minimize liklihood of actually introducing bacteria up into cervix. During labor, lol, there was no time for exams anyway. MWs got there, I walked into the other room and literally gave birth right then. They were there for... 5 minutes? Or less? before baby started crowning. No need to check cervix!
new town, new MWs. They do an antibiotic gel if GBS+ (vaginally) and then retest, and they say it almost always clears it up. They do administer ABX during labor if not. I will talk details when we get results of the test. I can post more about what this product is if anyone is interested. (FWIW I am again eating a very low sugar, low carb, high protein diet, and I just ordered probiotics to take until birth, but I do this b/c its good for me and baby for other reasons, not b/c I expect it to change my GBS status. GBS is not actually bad or pathological to have present in the vaginal flora. I think about 1/3 of women have it present at any given time).
oh and with my first- I was not at the birth center long enough to get the IV Abx early enough for their protocols. I ended up staying there for 4 days (with my son, thank goodness) b/c my son was under "observation". I felt he was overtreated and it was a really negative start to my life as a mother. Of course, it could have been much worse, but still. It was part of why I wanted to do HB after that!