I also was speaking to my midwife about this topic, as I was offered the swab last week. I was told that I could opt not to take the swab and that at birth I would be treated as though I was GBS negative. I was informed that with opting not to have the swab, all I have to do is monitor the baby's temperature for around 12 hours after birth and then if it does not rise, it is in the clear. If the temperature goes up, then the baby will need anti-biotics. That way there is no need for me to have the anti-biotics in labour.

Maybe you can ask about the option of taking baby's temperature after birth to monitor for infection? That way you can avoid having the meds in labour?

Hope you sort something out.