Sharp left back pain 35+4

Alyson

So i have been getting a sharp pain in the left middle side of my back. I woke up and didn’t feel it then it started all the sudden. Well it went away then randomly started again. It’s pretty painful but no tightening of my stomach and it’s just on one side. I’m only a little concerned because it goes away then comes back. I’m 35+4. Anyone else get random sharp pain in your back?