Braxton Hicks contractions?

Coco

I jus went through about 15-20 minutes of a hard tight belly and felt a really bad stomach ache 😖.. question is .. I’ve read they should only last 1-2 minutes? I’m confused Bc I was in extreme discomfort for like 20 minutes?? It’s already happened like 2-3 times this week... are these Braxton Hicks contractions?? (I’m 29 weeks pregnant)