Hi... if pain is unbearable then plz visit orthopedic doctor for some monetary medication(if required)and simultaneously take physiotherapy sessions. Physiotherapy is the best way to alleviate pain but it's a gradual process and you need to be patient with it. Till you visit anywhere you may use hot water fomenting for your shoulder as it's Diwali and you may not be able to get a physio. But if you get him/her plz ask for shoulder home regime so that you may get some relief.
Next Steps
visit nearby physiotherapy centre
Health Tips
You may use hot water fomentation for your shoulder.