I'm in UK and my midwife told me it was a standard thing? You usually have it around 28 weeks.
I felt fine though? You're supposed to wait an hour from drinking the lucozade but I only waited half hour because I forgot to drink it before I came! Oops.
But yeah, I felt fine. Maybe it's because you're not used to that level of glucose or something, I have been drinking cola all the way through my pregnancy so I'm probably used to it. xx