I am 32 years old this year, for about 2 years now I feel pain in the left chest spreading down my arm, a secret pain in my chest. Pain increases when the weather is too hot or too cold, at this time it is difficult to sleep (if you take sleeping pills, you will sleep well, then you will feel the chest pain). I have a history of transient atrial fibrillation with high blood lipids. I went to the doctor and the results: X-ray of the heart and lungs was normal, echocardiography was normal, and carotid ultrasound was normal. Blood CTM test was normal, blood biochemistry had blood fat 4.0, urine test was normal. Electrocardiogram normal. Doctor concluded anxiety disorder/atrial fibrillation. Doctor tell me how to treat anxiety disorder/atrial fibrillation?