I hate to say this, but you could be starting a flare. You may want to talk to your wegs doc and see if resuming lower dose prednisone is warranted. About four years ago, I had tapered off. Then, after about four months, I started having roaming joint pains. That led to my first course of rtx and back up to 40 mg of pred. On my next taper, I got down to 3 when the joint pain started again. Wegs doc said to go back to 4-5 mg and if the pain went away, to stay at that dosage. It did, and I'm still on 5 mg.
Unfortunately, some people just can't be off pred...
"Every day is a good day. Some are better than others." - unknown