Look at this information on fatigue and it might help you to understand what is going on. You are not imagining your fatigue and it could be the result of damage to your body, fatigue being the only manifestation of your lupus, or someothing else. Just because you don't have other symptoms does not mean that your lupus is not active.
I think that all of us wrestle with fatigue to some degree and there are probably many different causes.
Mixed connective tissue disease (systemic lupus, scleroderma, polymyositis), Raynauds phenomena, Hypertension, Barrett's esophagus.
Meds: prednisone 5mg, 50mg imuran, Lotrel 40/5mg, maxide 37.5/25mg, folic acid, potassium, aciphex 20mg, multi vitamins.
Maintain your optimism and you can beat the odds.
"Although the world is full of suffering, it is also full of the overcoming of it." Helen Keller