Can't tell the difference

Jessica
Any other mommas not able to really distinguish the difference when you are having a Braxton hick or not? Cuz it seems like my belly is literally always hard. I'm 31 weeks and I think I've been having a few Braxton hicks a day but my doctor told me its when my belly tightens/hardens up on me but my belly is always tight or hard where I'm so petite still.