Consistent BH contractions. (Every 3 minutes)

Ive been having BH pretty regularly for the last few weeks but,

I had a cervical check yesterday.

And now for nearly 24 hours I’ve had BH tightening (no pain) every 3 minutes, even all through the night. They’re not painful just super uncomfortable and very consistent. Lasting nearly 45 seconds each time, 3 minutes apart. They didn’t stop when resting so I’m wondering...could this be labor? At what point do I go to L&D?