While my implant is for sciatica, I have had three wicked cervical surgeries. I always used a foam neck support pillow to keep my head in a relatively comfortable position. I still use it if I have a nasty fibro or arthritic flare. I found it helpfull to sleep in a large recliner with a ton of pillows. Finding the best position is trial and error. And could change. Try to go with the flow. Easier said than done.

Gentle hugs and prayers.
Spine