I am 6 weeks and already showing and this is only baby #2. Every body is different but also you are much more likely to show earlier with each pregnancy because your body knows what it needs to prepare for. :) your uterus uses muscle memory from your first pregnancy to start the stretching process early. :)
Us either kids dont know yet !!
I am in the same boat with baby #4- pants are already starting to not fit!!! Trying my best to hide it until the 2nd trimester- we arent even telling our kids lol--