Cramps (Braxton Hicks?)

BriBre • 26. I have a son born April 2016 💙 RN 👩🏽‍⚕️ MilSpo

So I’m 16 weeks and the past few days I get random tightening in my uterus. It’s not painful but it’s uncomfortable tightening. It’ll happen once a day maybe once every few days randomly when I’m literally laying down doing nothing. I don’t remember this happening during my first pregnancy this early. Anyone else? Should I be concerned?