Pain/stitch left side

Molly
Hey Mommas!
I'm currently 17w3d with my first. Earlier this evening (before dinner) I noticed I had a pain on my left side. It feel like a side stich you would get from running or such. It's belly button level but on the left side of my stomach.
I've been drinking water, thinking it was because maybe I was getting dehydrated. I've tried going to the bathroom. I've even tried stretching. 
Nothing seems to be working! 😩 my husband keeps telling me it's growing pains. Is there any momma insight on what it could be? Or any soothing solutions you've had success with?
Thanks a bunch!!