Not pregnant yet/gender

Okay I'm still on the two week wait to test. But I was thinking I already have three boy's. An if I am pregnant I don't want to find out the gender until birth of course. Have any of you ladies done this? My SO can't keep a secret so he can't find out. But idk if I could not know lol. I want the excitement of finding out at birth, especially if it is a girl.