Did your baby catch up to fundal height in third tri?

[butterfly5]

Hi all I am popping over from 2 nd tri

I am 26 weeks and positive on dates but my fundal height is 29 cm. I am 5'6 and slim so bump does seem more obvious but I am all bump and no weight anywhere else and from back don't even look pregnant. Midwife has panicked me and referred me to see consultant on 5th of June. Had no sugar in wee

Some people say you can grow into your fundal height so I might be fine in a few weeks but I have no idea lol