Upper back pain

Does anyone else experience upper back pain.. it feels like my back part of my rib or muscle area kind of near my spine on both sides it doesn’t always hurt me but at nights I usually feel it the most as I’m trying to lay down. It feels good if I try to stretch it but it’s hard to stretch since I’m 27 weeks pregnant. I’ve never been a side sleeper obviously now I am and honestly don’t know if being in the same position is what’s hurting me. Either was anyone have advice