I am not always sleepy either.  There are some days that I feel like my body just can't go on and must take it easy but not take nap.  There are other days while doing tasks that my legs will feel exhausted and they can no longer hold me up.  My rhuemy says that is what happens.  So it is normal.

Yes, fatigue is very much a part of the disease.  My rheumy says if you not fatigued then you don't have RA.  I too am fatigued but not sleepy. 

To me the fatigue is the worst part of this disease. I would often take double the pain to be rid of the fatigue. No, you are not alone - there are times when I am so tired I feel like I should sleep for days, but then when I try I can't fall asleep. I just lay there and hurt... and think... and then get up.

Sometimes a nap will make you feel better though and what I do is try to time the medications that make me drowsy with times I want to sleep. This trick has helped me greatly.