Suggest Medication For Neck Pain Due To A Injury

Hi I am a make 37 years of age and very active I lift weights about five times a week and I also go to jujitsu. I recently was in jujitsu class and I was wrestling with a teammate he grabbed my neck and I heard a pop and ever since then I have been in lots of pain on my left side of neck and stiff in the trap muscles. Iwaited a few days and the pain didn t reside. I went to see a physician he prescribed me Nabumetone and Flexeril(10MG). After 2 weeks I still was hurting and pain didn t reside. I saw the physician again he gave me a steroid shot, I forget what it was and also prescribed me prednisone. My X-rays came back normal. I recently finished all of that with no signs of my neck getting better. I also did a few acupuncture sessions again with no help for my neck. It has been a month now and worried what it could be. Does anyone know what it could be? My next step is going to be MRI. Thanks.