19w3d, First Braxton Hicks?

Callie • 👶🎀 8.18.18. 👶🎀 3.16.20.

First pregnancy. 19w3d and twice today I experienced what felt like my lower abdomen tightening/squeezing on the inside. It hurt a bit, but didn’t last very long and was unlike my usual round ligament pain. Is this Braxton Hicks? Or might it be something else altogether?