Unexpected appointment & big baby!

Hiii ladies, I’m in the U.K. and i received a letter today for an unexpected appointment in the hospital next week to see an obstetrician, I’m 32 weeks on Monday and I’m just generally confused as to why I could’ve been put in for an appointment? I had a GTT last week and results came back negative & normal, only thing I can think of would be because baby girl is growing slightly on the larger side, which was the only reason I was put in for a GTT, (she’s in the 95th percentile) do you think this is much to be concerned about or just a general check up with extra care? I can’t call them until the weekend is over and I’m just a little worried :((