Is this normal?

I’m 21 weeks pregnant and I’ve been having a really sensitive to the touch spot on the left side of my belly. I thought maybe it was just babies positioning at the time, but it’s been 2 weeks now and I still feel that sensitivity occasionally when lying on or touching that spot. It almost feels like an internal bruise? Super sore. My next apt isn’t for a couple weeks so I’m just curious if anyone has any suggestions as to what this could be and if I need to call my OB sooner than my apt. TIA