Me and a friend were talking about this.. Here's what we have came up with...
You know your a mum when...

... You congrats bubs on doing a poo! (at least you know there eating )
... You cry when you have to change the straps up-one on a carseat... Or when you have to turn the car seat from newborn to toddler.
... You cry when you have to pack away bubs clothes because their too small!

would love to hear some of your additions...