Am I alright, how do I relieve pain?

[House_Pants]

I am very worried, and hope this is not something serious... I am a thirteen year old female, and have been having increasing amounts of pain in my lower back, upper back, abdomen, shoulders and neck. I have been to a chiropractor, and he has said I was really stiff, and my posture is poor. I haven't been back for a while, however I have still been having pain. I've tried exercising... See, I don't get out of the house much. I suffer from sever anxiety, obsessive compulsive disorder, and attention deficit disorder. I am writing this, because my anxiety is getting to me.. At the moment, I am having moderate pain in my left shoulder, neck, and all down my arm to my wrist. I went online and it said that I have a muscle strain. What are some ways to relieve this pain?
I am very worried, and hope this is not something serious... I am a thirteen year old female, and have been having increasing amounts of pain in my lower back, upper back, abdomen, shoulders and neck. I have been to a chiropractor, and he has said I was really stiff, and my posture is poor. I haven't been back for a while, however I have still been having pain. I've tried exercising... See, I don't get out of the house much. I suffer from sever anxiety, obsessive compulsive disorder, and attention deficit disorder. I am writing this, because my anxiety is getting to me.. At the moment, I am having moderate pain in my left shoulder, neck, and all down my arm to my wrist. About one week ago, I was stretching after a run on the treadmill and got a stinging pain in my neck. It eventually went away. I went online and it said that I have a muscle strain. What are some ways to relieve this pain?