Somewhere in a post from Saysusie, there is some good information on Plaquenil. You could do a search for it. Plaquenil is a pretty well-tolerated drug (I'm told) and can be taken for long periods of time without many side effects. Everyone is different, of course, so your experience may not be the same as another's. And Pearl is right - it takes time to "kick in" - sometimes a couple of months or more. I don't think it really was fully effective for me for nearly four months. But, it really helped with fatigue...A LOT.
You're right to question your doctor about your treatment and/or diagnosis. It's your life, after all - take your list of questions and don't be satisfied until you get an answer. Even an "I don't know the answer to that one" is OK - as long as they agree to try to find an answer for you, whenever possible.
I hope the next appointment goes well for you. Keep us posted.
"If you trust Google more than you trust your doctor than maybe it's time to switch doctors."