Hi, my daughter has went to the hospital last night because she is starting to have this pain in her chest. She can feel some muscle tightness, left arm hurting (shoulder also), back pain, and leg also. She took Advil medicine but it did not work for her. The doctor says about Lyme disease.. She never been to the woods except two years ago but she never got bitten by one so.. She might have a heart problem but doctors says that it's nothing like that. Right now her breast hurts and she can feel some sting also. My daughter can probably have fibromyalgia since it's hurting everywhere around her body but I don't know about the heart and the breast.. Her neck sorta hurts too. She does not have difficulty breathing but the chest pain is getting on her nerves. Somebody please help! The doctors doesn't know what this mean. She is 12 years old and she is not overweight. What can this be?