Something happening??

I’m due tomorrow, 1/22, and feel like something is starting to happen. Idk if its just my body playing mind games or if it’s the very early stages of labor. Starting around 12:45pm today my bump got really hard, not painful like a cramp but just felt different and a lot of pressure in my lady bits. This has been going on every 30-45 mins or so. Could just be Braxton Hicks. I didn’t lose my plug, have a show or water breaking. But that didn’t happen with my first either so 🤷🏻‍♀️. What was the early stages like for anyone else?