You may find that you have strong histamine reactions (itching, rashes, psoriasis etc) as your immune system attacks your skin/fascia. It's quite likely that your reaction was to the Etodolac, but you may notice such reactions even without any obvious cause.
One of the important things to know about ReA is that it is, well, more *reactive* than many other auto-immune conditions, which themselves can flare any time your immune system is stressed: you get a cold, a "stomach bug," the flu, or another kind of infection....even mold exposure or strong allergens....and your pain/inflammation can get much worse. So....avoid catching any sort of infection/germs/viruses or being exposed to excessive mold spores!
The best thing that I've found to fight the inflammation is Turmeric. It's a middle eastern/far eastern spice that is very gentle on your body and has none of the drawbacks of pharmaceutical NSAIDs. If anything, I think it actually works better than they do.
There are a few other things that can help: piperine (black pepper), ginger, bromelain, vitamin D (muscle spasms/soreness as well as your auto-immune condition itself). But turmeric is far and away the most dramatically effective that I've found.
ReA can attack much more than just your joints. It can cause inflammation and damage to virtually any organ in the body, and frequently does. You'll want to take extra good care of your digestive tract, for one thing. Probiotics are good, but most only include 1-3 strains. You want the really expensive stuff that contains 10-20 strains...most particularly L. Reuteri. This has been shown to thicken the intestinal walls and protect against several inflammatory pathways in the body as a whole.
I don't want to be unduly negative, but often people get worse with time -- though it can be very variable and unpredictable. That's why I suggest you do everything you can to slow the progression, avoid immune stress, and stay in decent shape so that hopefully you'll be far better off years down the road than you would have been if you'd just waited around hoping for a remission. A lot of docs will just shrug their shoulders and say "we'll try to help you deal with this for now, and hopefully it will 'burn out' on its own eventually"....and many of us ReA sufferers don't know what to do except trust the doctors.
Frankly, very few docs -- even rheumatologists -- understand ReA very well. So don't expect the voice of experience or specific knowledge from them....you may want to join RISG.org, the Reiters/Spondylitis/ReA-specific support group.
Conditions: Reactive Arthritis (AKA Reiter Syndrome), Crohn's Disease, Chronic Pelvic Inflammatory Syndrome, Sacroiliitis, Costochondritis, As Yet Unknown MS-Like Relapsing/Remitting Neuropathy, and a partridge in a pear tree.
Medications: Currently not that many are taken daily, but there are many at my disposal for part-time use. Low dose pain medication, after years at high doses. Working on innovative ways of taking lesser-known pharmaceuticals and non-prescription supplements to maximum benefit.