ahhh i got this with my second pregnancy.
Was meant to have 4hrs of antibiotics before birth so they told me as soon as labour starts, come in to the hospital WELL i had my baby at home because of his quick arrival, he didn't catch it but kept an eye on him with monitoring his temps etc. I read up on it when they said i tested positive and it did say WORST case it can cause death BUT thats the very worst, its like when you get the epidural they 'have; to tell you that it can paralyse(sp) you.
Don't stress about it and the drs know what they are doing