I had regular BH contractions 24 hours before I went into labor- not painful at all. They started 7 minutes apart and then 5 minutes apart. Then they stopped. However, when I went into labor, it was 5 minutes apart and very painful. When I made it to the hospital, I was 9cm. They told me that I should have called the day before just to make sure everything was ok.
Who knew?
I'd say, if rest, hydration, positions don't stop the BH contractions' regularity, you should give them a call. Worst case, they'll say "it sounds like nothing, and we will see you when the painful ones start."
Web MD even says,
"Unlike true labor, Braxton Hicks contractions:
Are usually not painful
Don’t happen at regular intervals
Don’t get closer together
Don’t increase when you walk
Do not last longer as they go on
Do not feel stronger over time"
I think the regularity is what would make them want to see you.
Good luck!!