Aside from the pain your complaining is there any numbness or tingling sensation you feel anywhere from your arms to hand? making sure that there's no nerve entrapment involve. As u mentioned that there's radiating pain u feel.
If none feel, then you could do a gentle stretching exercises of your neck. lateral neck flexion ( stretch and stop when u feel the pain) and hold it for 7seconds and repeat up to 7 times and progress it to 10 times. If you can do it 2x a day.first thing in the morning upon u get up and one before going to bed.