Will I ever regain motion in my right arm?

I have been having pain in my right shoulder and can't raise my arm. I get pain in my right side neck as well and feel extremely tired. The pain shoots to my elbow and if I try to move my arm I feel something pulling in my fingers. I thought it was maybe that I slept on it but I do remember slamming my right shoulder against the entrance to the bathroom. I am not fat but can be very clumsy at times. I am calling tomorrow to make an appointment to see the doctor. I thought the pain will go away but my arm feels heavy and I can't use it. When I try to raise my right arm my shoulder rises so the shoulder is completely stiff. I went to the pharmacy today and asked the pharmacist what can I use for pain and he looked at me like I was crazy. I bought Icyhot medicated patch but the smell just gave me a headache. I suffer from low thyroid so I read on the internet that frozen shoulder is common in people with low thyroid. My arm feels extremely heavy so I have it on top of a pillow but my neck is also hurting. I am wondering did I damage something or is it some swelling from the bang. I don't feel extreme pain if left still but will consider pain to be a 3 from 1-10. The pain comes if I try moving the arm or help my 4 year old get dressed. The icy-hot patch just caused me more discomfort and pain. I am very active and lost 20 pounds so I weight 150 which is not considered too overweight.