BH at 16w5d?

Michelle • Happily married ❤️💍 Gianna 👶💖 08.01.21 ❤️

This morning while in the shower I felt my lower tummy tighten up like almost a Charlie horse feeling for about 15-30 seconds and then let up.

It freaked me out and when I googled it seemed like maybe Braxton Hicks?

I’m a FTM so not sure what to think. Is this normal or should I message my OB?