So I was walking my dog and got an extreme tightening pain on the left side of my uterus. I thought it was just because of her pulling me. I got inside and it took over the entire front of my uterus and was extremely long and painful. It felt like one really long contraction, so there was no way to time it. They have gradually dulled over the last two hours but I can still feel the tightening and cramping all through out my uterus into my back. I'm 36 + 2. Are these just Braxton hicks?