Suggest Remedies For Pain And Soreness In My Shoulder Muscle

I have cramps in my shoulder (from the bicep to the muscle conecting the shoulder and the neck) now if I stretch my arm the pain goes away temporary but returns worse than before not long after my shoulder twitches the whole time and the pain gets worse, I told my mom and she gave me pain pills which worked for a while (maybe a week if not less) now it doesn’t work at all but with all the stretching the shoulder joint and my shoulder blade snaps (knak) each time. And now the joint is sore I can barley move my arm or put a little pressure on the joint. I don’t know if it is stress but it just gets worse please help. I explained this to my mom and she said she would see if she can make a appointment at the doctor, but I really need to ease the pain, i’v been using pain pills(tramacet) and voltaren. what can be wrong? and what sulution is there till my mom can get me to the doctor?