Braxton Hicks?

Ni

Currently 31 weeks pregnant with my first baby and I’m not sure if I’m experiencing Braxton Hicks or if it’s just the baby. I keep getting a tightened ball but it doesn’t last long, maybe 30 seconds or less. Not sure if it’s the baby’s position or quick Braxton Hicks? 🤔

How long do your Braxton Hicks last and how would you describe them?