How can severe shoulder pain be treated?

Hello doctor,

Approximately 4 months ago, some mild pain started in my right shoulder joint but i have not taken it seriously. It started bothering me since end of February and it was slowly worsening. I daily travel by crowded trains, approximately 25 km to my workplace and back. By middle of March, while travelling (by standing) in train holding overhead handles my shoulder was hurting with every push from the crowds at various stations. During day time, there was not much pain I felt, but in the night, my sleep was disrupted frequently with pain (like pulling with a hook) on the shoulder. I applied "DYNAPAR QPS" (Diclofenac Diethylamine and absolute Alchohol Non-Aqueous Topical Solution). My mother was using it for joint pains and she asked me to try it but I got no relief with it. Then my cousin practicing Homeo medicine advised me some Homeo medicines and it provided only a slight relief.

In the 1st week of April, I consulted an Orthopedic (Joint pain/bone specialist) and had taken X-ray of my right hand in 2 different positions. He suggested it is due to frozen shoulder problem and advised rotation of hands, shoulders, neck, etc., along with some medicines (mainly pain killers and anti-acidity medicine). Even after taking it for 25 days, still I am having pain, mainly in the inside bend of the right-elbow. If I raise my hands straight, it hurts very little, but if I bend it to comb my hair or putting my hands through the sleeve of my shirt it hurts very badly. During day time, the pain is very minor but in the night after the sleep of an hour, it starts paining badly. What I assessed is, while the weight of the upper body rests on the shoulder or around the area (including back side) while lying down, the pain radiates from this region and it hurts mainly the shoulder joint, forearm muscles, elbow joint and the wrist. After trying various positions to rest the hand and shoulder with pillows/soft towels, the pain eases little and I fall asleep again. This repeats throughout the night.

I use Laptop extensively at work and at home also. Sometimes I feel a pulling pain in the wrist when I use the mouse more, but no problem with key board. Now I am working from home due to Covid19 lockdown, but afterwards, I may have to travel again by train and I am scared of the pain I will have to suffer.