I have had numerous blood test over past year and have been low on vit d and b. i am tired all the time , have frequent headaches and lightheaded feeling quite often. this has been going on for a year. what should i do?

Add vitamines : You should eat healthy food like fish, few times a day, spend more time outside on sunny days. Also you need see bgi specialist to be shure you bowel absobs vitamines.

See below: 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.