Do not ignore such pain. Start applying ice pack on shoulder. And start isometric neck and shoulder exercises like shrugging, chin tucks ,some trapezius stretch, it will relieve stress on muscles. As per symptoms there is weakness in your muscles so after completing all exercises regularly.another week start theraband exercises for shoulder, pendulum exercises.
Next Steps
do wall stretch stand infront of wall keep one hand distance between wall and you.slwly move forward with hand sliding on wall try to touch upper area of of wall as much you can and again try to take your hand down slowly going back to starting position.
Health Tips
try to book appointments with practo physiotherapists so we can guide you for better results.