Help!! How to most effectively turn this patient!!

Okay so I’m a peds home health nurse. I work alone, and recently I got assigned to a patient that is in a safety bed. This one specifically is up against the wall in a corner and all the sides are enclosed except the left side. I’m having a lot of trouble being able to turn this patient and not completely throw out my back. The pt is 165 lbs (and is usually dead weight due to his condition) and I am no more than 140. My back is starting to hurt so bad, and I feel like I’m not properly taking care of them (besides the basic brief change or chux pad change)or myself.
Should I just ask for a reassignment? What is the best way to go about this??