What Causes Chronic Lower Back Pain And Extreme Fatigue?

I am a 50 year old female. I have had chronic lower pack pain, extreme fatigue, edgyness, depression, all over joint pain and mild chest pains for almost a year now. I feel like I am dying. I have no energy and can sleep all day everyday. I feel a buldge in my lower back when I lean back in a chair. I can barley lift a glass of water without dropping it. I have a chronic cough which has not gone away for months and my hands seem to always tremple. I am not on any medications and do not drink coffee, tea or soda. I eat a balanced diet but have not been able to exercise, walk or stretch for almost a year now. As I sit here at my desk typing this, I am falling asleep and I had 8 hours of sleep without walking up. What is wrong with me?