I am still confused as to where I am supposed to put my head if I am sleeping on my side?
Probably wherever is most comfortable for you but I use Either the left half side or the right hand side of the pillow depending on which side I'm laying on.
If I want to return due to neck pain, what category do I click for reason for return?
I returned mine as it did not help me either. I do not remember what I chose. “Other” always works. You can always send a note along with the return to be more specific.
Is there a recommended cover for this pillow ?
The memory foam pillow itself is already inside of the white quilted looking cover that zips. Just usewhatever pillow case you have.
I didn't get a free pillow case. Is it that quilted thing that is the cover? Or was I supposed to receive some separate case?
Yes I think it is the zip up quilted cover on the pillow
Is this a good pillow for side sleepers who have had cervical spine fusion? If so, what would you recommend for firmness?
I used to change the pillows. Because I feel sore when I wake up, sometimes I can’t turn it. But after using this pillow, there is a significant improvement.
Do you have to sleep on a certain part of the pillow if you are side vs. back sleeper?
My husband sleeps on the side, placing his head in the middle of the pillow. He says it works great for him and his neck now feels better than when he was sleeping on other pillows. However, he is trying to retrain himself to sleep on his back.