I have shortness of breath, a feeling of fullness in my chest, and pain in my back and sternum. When taking deep breaths, I have a sharp pain in my back on my right side under the shoulder blade. There s a general, uncomfortable heaviness or fullness in my chest and a soreness in my sternum/chest /right below my ribs. I do not smoke, I do not drink often. I am a 28 year I m old female and overweight. I do have occasional allergy related asthma and acid reflux but do not feel like these are my usual symptoms.