Suggest Remedy For Stiffness And Pain In Neck

I have been suffering with a very painful stiff neck since last night, I can touch my chest with my chin with a lot of pain though but it is too painful to move from side to side . I have a headache on the side it hurts which worsens if I put pressure on that side of the neck and my neck hurts on that side if I swallow . I have kept it warm and took painkillers but they are doing nothing and the pain is keeping me awake. Is there anything else I can do.?