Really long contractions? (I think)

Cici • Mama and Etsy shop owner! My etsy shop is SerenadeBaby
So I'm pretty sure I'm getting contractions, as in Braxton hicks I'm guessing. I'm 23 weeks and a couple days but they have been lasting for about 20 minutes at a time! With just a few minutes of relief in between. Is this normal? Of course I'm going to contact a doctor if it continues, just would like some opinions on this.