I'm having back and leg pains. my body feels tired and i often feel sleepy. it's as if i have been through a heavy work out at the gym whereas i haven't. this thing hv been going on for two weeks now. what could be wrong? please help?

Need to examine: It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor and discuss if you may be depressed. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Wish you good health!