When does the uterus "push up"?

[charlottexox]

The title makes hardly no sense, but I read online that at 12/13 weeks (I am 13 weeks) that the uterus should push up, so the bottom of your stomach should feel hard(?).
I am only experiencing hardness on the left side at the bottom side of my stomach, and not the right - is that normal?

I don't know, but I think it depends on your weight/tummy muscles etc.

At around 12 weeks the top of your uterus usually starts to peep up above your pelvic rim/pubic bone. So if you dig your fingers down around the bladder region you may be able to feel the top of the uterus (aka the fundus) like a firm ball.

It'll still be very low down there though so you might not feel it yet.