Okay ladies...could really use some advice

I have this awful pain in my upper back between my shoulder blades when i bend down or reach for something it feels like something is pulling...it starts out only hurting a little in morning but by evening I can't sit, stand or lay without it hurting. I've tried tylenol and heating pad but nothing gives me relief. Some days it hurts so bad and make my back muscles so tense i feel short of breath. I'm 28w2d and did not have this much pain with my other two. I would appreciate any advice I can get. I have a doctor's appointment tomorrow but I figured I'm just gonna get told there is nothing they can do so I thought maybe some of you ladies might have some tricks up your sleeves....I just want relief😣😳😩