@Jellycat2020 obviously totally your decision, but just for info the reason I’m weighing up the antibiotics is that they wipe out both yours and the baby’s microbiome.
For the baby that can have lifelong health implications too (like increased risk of asthma and obesity). Obviously much less serious than the consequences of GBS infection, but still a risk in circs where 199 times out of 200 the antibiotics aren’t needed, and the 1 time they are, they only help 80% of the time. Extra factor for me is that my first birth was really fast so it’s unlikely I’ll even get to the hospital in time to have them, which is quite stressful! I still don’t know what to do for the best.
Also re pencillin, the reason they don’t let you have a home birth is that anyone can have an anaphylactic reaction at any time, even if they’ve never previously been allergic, so they need you to be in hospital when you get them. The risk there is 1 in 10,000 so really very tiny, but it’s there for everyone and can also be fatal.