This can be radiating pain from neck...
Next Steps
try heat pad for 10 mins two times a day at home along with local gel application ( volini, ect) what ever is available at home.
Health Tips
try neck strectches at home, follow link below
http://www.healinghandsphysioclinic.com/home-exercise.html
no. 49, 50 and 51
make sure u don't have any nausea or vertigo when u do these self stretches.