Major stomach tightening!

Katie • Anya Rose Nishioka 6/8/2016❤️🌸 Young mommy (20 years old)👶🏻 instagram is katnishioka.fitness
I'm 37+3 and I've been getting what I guess are contractions fairly regularly recently. They are just the painless (uncomfortable but no cramping feeling) kind. I guess they're Braxton hicks but I'll get them every few minutes within an hour then they'll subside a bit. It's so confusing🙄 I don't think I'm in labor at all but does anyone have experience with this?