When did your belly Pop out ?

Bri

I'm 20 weeks and Have a lil bump , this is my 3rd and with my 1st born ( boy ) I didn't get a big stomach , with my 2nd ( girl ) I got big with her , and well I'm on my 3rd ( boy ) I'm not as big as I thought id be ....

Its been about 3 years Since Ive been prego so bare with me lol , I just want to know when did your belly decide To Pop and you looked Prego .