What Causes Severe Pain In Sternum Radiating To Prostate Area?

G afternoon, I have a pain in my sternum area and when I turn or move to the side it s like it so painful it takes my breath away. The pain also radiates straight back to my spine area between the shoulder blades. I just had an mri of that area and they found nothing. I also had this same chest pain and the pain radiated down to my prostate area. The dr. did a perfusion at that time and said there was no heart trouble. Any answers would be appreciated. Thank you.