Cervical Disc Replacement - PostOp

Hi.  I just had C5-6 and C6-7 replaced 2 weeks ago.  I'm recovering well, however, I have severe burning in my right  shoulder area.  I'm trying to keep my posture correct, but this pain is often overwhelming.  I was hoping to decrease my pain meds by now, but it's just not  possible at this point.  I currently have dilaudid and Norco for pain, and try to take the dilaudid only at night.  I'm also taking muscle relaxers...but I still have that burning pain no matter which Rx I take.  I sometimes have the burning on the left side, but it's not nearly as severe as the right side.  Any thoughts on why I'm experiencing this, and what I can do for this?  Thanks!