Pain in back

Starting about 3 weeks ago ive been getting this pain in my back and stomach. They are connected because they happen at the same time. The pain in my back is located just about the center of my back under my shoulder blades. I get slightly nauseous but its mostly just painful. It hurts more when i put pressure on my stomach on the right side under my ribs. Is this my gallbladder?

Ask for an ultrasound and HIDA scan to check your gallbladder.  However, pain under your ribs, into your back and shoulder blades can also be gastritis which can be checked by an endoscopy.