Humira & Back Pain? or Palpations?

It is listed as one of those vague side effects for Humira, but has anyone experienced an uptick in low back pain after starting Humira??

Also, for the experts in the crowd. What about cardiac rhythm issues with Humria? I seem to be having some minor arrhythmia that has me worried. I have a history of Afib that was burned/frozen out, don’t think it is that again. I am beginning to wonder if it is just the increase constant pain creating causing some palpations.

Thanks ahead of time.