I am a 12 & was with my 3rd pg.
I think I weighed about 64 when I fell pg & am around the same height as you.
I looked a bit bloated at around 8 weeks, but thats what it was. It was also my 3rd pg. I started showing at around 4 months.

With my first 2 pgs I was only an 8 - 10 (57kg when I fell pg with DD1, about 60kg with DD2) I didn't show with either of them til past 6 months.

I hope that made sence.