Welcome Rachael

Here is definitely a place you can come vent and even brag - perhaps you have noticed there is a whole thread devoted to bragging since so many people here don't have a safe place to do this.
It sounds like you have a wonderful little girl. And when you are with the other moms maybe you can talk about things like how much she loves (or tortures) that cat or other topics that do not include milestones. Then come vent or brag away on here about the rest. :-)