it sounds to me as if your current medication is not controlling your RA. Talk to your doctor about treatment options, such as increasing the medication you're on, adding another DMARD (disease modifying antirheumatic drugs like methotrexate, Plaquenil, Arava and the Biologics) or perhaps switching meds altogether.

your nausea and weakness could be a side effect of the medication - check out my post on managing side effects for tips on how to keep things down to a dull roar. You may also want to talk to your doctor about maybe getting a prescription for stomach medication (Pantoloc, Nexium) - many of us have to take those kinds of medication to protect our stomachs, as RA meds are notoriously hard on the G.I. tract. You could also have a virus, in which case go easy on yourself for a couple of days, eat bland food, drink lots of hot water with a small slice of lemon and a small slice of ginger and see what happens. If you get better in a couple of days, these particular symptoms were likely a virus. Still, I would recommend that you make an appointment to see your rheumatologist to discuss where to go from now - if you still having the same symptoms as you did six months ago, the meds you on now do not seem to be working.

please let us know how things go?