Why is prednisone not helping anymore?

I'm getting worried, my rheumatologist took me off my Orencia about 8 weeks ago to start on Xeljanz, we'll I just got it last week, and I feel my dr. Not getting insurance requests on time, it shouldn't have taken this long. So about 2 weeks ago everything started getting bad fast, my wrists have a permanent knot over the last year of flares, but my thumb joints flared so bad I couldn't even close my hand to brush my teeth.
What's really got me scared and yes I have told my dr. Over last year I keep getting flares in my neck going into the base of my skull all the way to my shoulder. Prednisone has always helped in emergency flares and it's not helping me like it did. I took 70mg this morning as I woke up and the pain in back of my neck was the worst it's ever been, I couldn't lift my head from my pillow. I'm scared something major is being overlooked and called my rheumatologist twice still waiting on a return call. I will say it seems like even though it's not new pain, it has really intensified within 24 hours of starting Xeljanz. I had 2 good days Sunday and Monday and then came right back yesterday evening