I'm 20+ years into this disease and have pretty much been through it all. Not saying that what works for me will work for you, but chronologically, here's how it went with me:
MTX and NSAIDS, and when that wasn't enough, they increased the dose.
Then they added Kenalog injections into the joint, not the muscle. But these injections, while very effective, don't last forever and you cannot get more than 2 per year per joint or the tendon tissue may rupture.
When that wasn't working, they added Tramadol [synthetic moderate pain killer].
Then I went on Humira, a biologic about 3 years ago. The MTX dose was cut in half. I no longer need Tramadol I do still take Celebrex [NSAID]. I haven't had a Kenalog injection in about 4 years.
I am very much against systemic Prednisone [pill steroid] because I am diabetic and it makes my glucose go up. I also think that too many doctors had these, and pain killers, out like candy, when they should be focusing on DMARDS and biologics.
Most autoimmune drugs will make you feel lethargic when you're in "flare mode." Sadly, MTX will also make you feel lethargic as well, but typically only for one day a week when the dose is high.
As your flares are controlled with the drugs, the achy/sometimes flu-like symptoms will go away.
I want to give you hope. I'm in my 60's and in spite of the diseases, I still sail regularly and really enjoy life now. So I suggest that it might be wise to understand that the first year is the hardest. There typically ARE some lifestyle changes. I promise you, you will become an excellent time manager!
Keep asking questions. I'm not sure if this forum will allow it - or possibly delete my post - but there is another forum.......you will get great insight from other old timers like me. Rather than post the URL, go to Google and enter this:
community "RA Connect"