I used to suffer from this. I found Rhodiola Rosea really helped me. You must get the Rosea variety as that's the one that her performed best in Russian clinical trials. You might have to buy it over the 'net as most health food stores don't stock the right variety. Take it each morning. Don't take if you suffer from high blood pressure.
Spatone Iron is very good for helping any anaemia. Take it with some fruit juice to help iron absorption. Don't take just before/after tea as tannin inhibits iron absorption.
Vitamin B complex
A good quality multivitamin/mineral supplement
Passiflora can help you sleep and help improve the quality of your sleep. If you really struggle to remain asleep during the night, try Valerian as well, but you can always cut this out if it makes you tired the next morning.
Try to get to bed early at night. Don't sit up too late. Try a magnesium/calcium supplement last thing at night to help you relax and sleep. Lavender essential oil sprinkled on the pillow can aid sleep.
Try to avoid junk food, sugary foods/drinks, too much caffeine. Bread and foods with gluten in can lead to tiredness. Try eating oat based foods instead, such as porridge and oat biscuits.
Drink plenty of water as dehydration can cause tiredness.
An antidepressant - chronic fatigue can sometimes be a symptom of depression. If the doctor prescribes you one, take at night as the labels from the pharmacy usually tell you to take it each morning, but they can lead to tiredness, so try taking it at night instead.
I can certainly empathise with you. Chronic fatigue can be crippling.