i am confussed by the web site and its treatment for gbs....or im dumb but im finding it a bit unclear

i was told by my midwife and several others that...
a) i cant have a home birth becuase i carry gbs
B)i MUST be in hospital as soon as i realize im in laboure on intravinas antibiotics

the website says i dont have to have antibiotics while in labour? unless im high risk gbs?
can someone explane please....cos i realy want a home birth next time i give birth...and im happy to hold out till i start pushing