Its quite normal that you have not been weighed because research has shown that in general weight gain in pregnancy is irrelevant, you can gain or lose wight without it necessarily affecting your bub or pregnancy.

I put on 35 kilos iwht my first pregnancy. I dont know how much I've put on so far ths time becuase Im not weighing, but I do know I am eating a lot better overall, so Im not fussed about it.

average is 6-16 kilos but it depends. Smaller people tend to put on more weight than larger people for some reason.