FTM Question

Laura • Wife + Mama to 👧🏼 + 🧒🏼 + 👼🏻 + 👧🏼
This may be a dumb question, but as a FTM, I'm just curious what a contraction feels like. I'm having a tight pain on my stomach and am just curious if that's the beginning of Braxton Hicks - I'm just about 29w, is this when they would begin?