At your age, neck pain radiating to the shoulder is very common and often caused by muscle strain, poor posture, or minor nerve irritation. Since Combiflam (which contains ibuprofen and paracetamol) has not provided relief, the pain might be due to a muscle spasm or joint stiffness that needs a different management approach. Please do not worry, as these issues are usually highly treatable. For now, try applying a warm compress to relax the muscles and avoid sudden movements. I recommend consulting a healthcare professional for a proper evaluation if the pain persists, or if you develop any numbness or weakness in your arm.