What is the best way to help neck pain, especially at night when sleeping?

I’ve been having a lot of pain in my neck and was wondering the best way to help it at night when I’m sleeping. I sleep on my side or stomach mostly. I am unable to sleep on my back. I thought about buying one of those neck pillows, but I’m not sure I’d be comfortable. Any recommendations? Also, I don’t want to spend a fortune!
I went to the chiropractor today. I will get my x-ray results Tuesday, however, I would like a cheaper alternative that I can do on my own.