I was GBS positive when I had Emily. I was given antibiotics about a hour before she was born and had no problems. We went home 6 hours after she was born. Keep a eye out for bub getting oral thrush, their tongue/mouth gets a white coat. Emily got it from me having antibiotics and they can pass it on to you while breastfeeding and it hurts really bad, so its important to treat asap, which I didn't. You can get stuff from the chemist to treat it. I hope you have a great birth. Best of luck.