Braxton Hicks Contractions

I’m currently pregnant with my 3rd baby due in July. And recently have been having a lot of tummy tightness. I can’t remember if I had this with my older two children but is this considered Braxton hicks? It doesn’t last crazy long but feels like my tummy is flexing when I’m not. I’ve also been told by an ultrasound tech that I have a lot of amniotic fluid because apparently I gained 17lbs in 2 weeks from my doctors visits. Luckily I don’t have high blood pressure and no swelling so doc wasn’t concerned and said it could be water weight. But man this baby is definitely giving it to me this time around.