Braxton hicks in subsequent preg

Am I imagining things or am I having tiny BH already? I can't remember when they started with the gremlins, and I never had them at all with Maya, but every now and then my uterus goes rock hard for a couple of seconds. Not often, I've just noticed it a couple of times in the past couple of days.
I know that you have BH right from day one but you don't feel them until the uterus is bigger, but I didn't think you could feel them this early?

I felt them pretty definitely from about week 16... and this is my first baby! My MW told me that's what they were, she could feel them when I felt them too. She said it was pretty early to feel them but completely normal.

ETA: I thought it was pretty weird to be getting BH when I didn't even feel the baby kicking until around 22 weeks! But hey, no two pregnancies are the same I guess!

Edited by Janey77

I have been feeling them for a few weeks now but can't remember when they started Preggy brain and all..

I felt them from 18 weeks. They have been getting more defined over time since (longer and stronger and able to define when they start and finish.)
I didnt get any either when pg with DD.