How early CAN you show with second baby?

M • 💙 Our blessing arrived 08/18/2017 💙 Baby boy #2 arrived 11/14/2019!

I thought everyone was crazy for posting that they are already "showing" this early. With my first baby, I didn't pop until 20 weeks, and it wasn't noticeable that I was pregnant until 23 weeks. I feel huge and I know it is just bloat, but I normally have a very flat tummy and we are not wanting to tell people yet, but I am worried it is completely obvious. Even when I wake up in the morning I can feel a small hard bump where my uterus is.