When did you decide you were ready for your second baby?

Rachel
Our son is 19 months old and we're trying for our second, just decided this month! I think this is a good gap to start trying because he'll at least be 2 by the time number two gets here, if it works out quick (it took a year for our first) 
I'm just so excited and nervous I wanted to hear when you knew or if you ever really know. Lol. Financial wise we're fine, just trying to prepare for the craziness of a family of four and would like to hear what it's like!