Hello. You didn't mention your occupation, sometimes happen due to recurrent activity of hand like typing, playing badminton, writing.It can be tennis elbow but detail assessment required.So meet physiotherapist.About shoulder pain you have to find out root of the pain if posture related than correct first posture and do exercise regular, strengthen the muscles.
Next Steps
Visit physiotherapy clinic.
Health Tips
Use tennis elbow splint during activities. Stop playing badminton.Apply ICE 10 mins twice a day on elbow area.