Getting v sharp pains seems like under my right shoulder blade near the spine. seems to come and go with nausea + fever. really unbearable at times?

Need Thorough Eval: The location of the pain and its accompanying fever and nausea makes the potential dx long . The anatomy at the point you described is complicated (back of the heart, lungs, diaphragm, liver....) and may need additional expert evaluation (CTscan, blood tests, others). It's best to directly talk to a doctor about your signs and symptoms.