Yep, I've got it too and my OB was totally unconcerned about it!! As everyone else has said, it just means we need the antibiotics at the first signs of labour. I've heard that some places don't even test for it and just administer the antibiotics as a standard thing, so nothing to worry about. My OB also mentioned that he just wouldn't want me to have a long labour - which is fine by me (so long as it doesn't end in a c/s)!! So yeah, completely fine and VERY common.

Kelly xx