When I stopped Plaquenil, I ramped down slowly and did not experience any kind of flare. I think if any symptoms had resumed we would have continued the plaquenil.
I would suggest contacting your rheumy ASAP and resuming the Plaquenil. If you wait too long those flare symptoms might get out of control - if you get back on the Plaquenil quickly maybe you can catch it before things get too bad.
Good luck! And keep us posted.
Lynnwood, Lupus & Sjogren's Moderator, Dx: 2002DIAGNOSING LUPUS & LUPUS RESOURCES
"Life is far too important to be taken seriously." - Oscar Wilde