Sharp pain in my left shoulder blade. Neck pain radiates behind my ear. Shoulder pain and soreness. And little arm soreness as well. Pinched nerve?

Discuss with MD. You have a lot going on for your age, please discuss this with your doctor, you may warrant some further testing. This is not a good forum for this question as we can not diagnose "pinched nerve" without examination and testing. Your doctor may order a nerve conduction test coupled with an emg, or an MRI if they have not done so already. Discuss with your doctor.
Possible. Possible c3-4 nerve pinged. An emg/ncs study is indicated.