I started leaking at about 18 weeks in my first pg.

If you know when your last period was, and are confident it was a real period, then your dates shouldn't be too far off. The most accurate time for the docs to determine bubs age by ultrasound is before 12 weeks I think. It'd be pretty inaccurate to do it now at 25 weeks.

I was pretty huge with DD and everyone was convinced I was going to go early.. and well.. I did.. she was 6 weeks prem LOL. I hated people saying it to me tho.. and hate it even more now that they were right!

You obviously just have a big beautiful bump! Enjoy it I loved looking pregnant, I'd be very disappointed it people couldn't tell I was pregnant LOL.