Anyone else’s labor start as just what you thought were Braxton Hicks?

Been having Braxton Hicks for the last two hours off and on. Just really tight and uncomfortable. Baby girl is still moving. I laid down, used heating pad, drank water and magnesium.

I am a bit constipated and thought maybe that’s causing them?

How can I get them to go away? I’m only 35 weeks and have no other signs of labor or health issues.

At what point should I call the doc if they continue?