That hasn't been my experience with Plaquenil... for me my disease carried on as it had with flares and a constant low level sort of symptom set until after 9 months on it at which I noticed a reduction in flares and fewer severe symptoms/pain/rashes. Most likely, the over doing it at the gym set off another flare up for you or it's just the disease doing it's thing with no rhyme or reason to it.
Let's just hope it's shortlived - and you start to feel better very soon whatever caused it.
Let's just hope it's shortlived - and you start to feel better very soon whatever caused it.