Braxton Hicks??

Hey all! I'll be 30 weeks in a few days (holy crap!). This will be my first baby.

I keep getting a tight feeling at the top of my uterus. It will feel tight, (not painful, just odd?) for a while, then I won't notice it and it'll come back sometimes days later, sometimes hours later. It feels uncomfortable if im lying on my side and if I sit up straight or stand, it's just weird not necessarily uncomfortable. Started about a week ago.

I'm assuming these are Braxton Hicks contractions? I always thought I'd feel it lower, or somehow differently or it would involve the whole uterus somehow? I know it sounds dumb.

Is my assumption correct? Does anyone else feel them differently?