Cramping at 12 weeks?

Kristin • Wife. Puppy mom. Expecting baby #1, due 10/26/2016 👶🏼🍼
Hey ladies,
I'm 12 weeks 1 day and have been experiencing some minor cramping and pulling feelings for the past two days off and on. Anyone else going through this? Should I be concerned or is my uterus just stretching again? First pregnancy so every little change makes me worry!