27 weeks pregnant been diagnosed with Group B Streptococcus

Vanisha.
So had a vaginal swab done because of increased discharged. I have Group B Strep. 
Doctor has said i will need to be on IV drops 2 hours before labour and which will be given through a span of 4 hours.
Has anyone had any experience or heard of this??
and delivered a healthy full term baby?? 
Any adviceon what i should expect??
I already have high risk of pre term labour and now this! 
Not getting too enjoy this pregnancy and getting more and more stressfull as its progressing 😔😓😖