Based on a PT's recommendation I went to a memory foam contour pillow a couple of years ago. It has worked very well.

Recently I was getting the sense it wasn't working as well. Headache rate was slowly increasing. The bottom line: I decided it was time to try a different one.

Just yesterday this one arrived from Amazon. It has a removable foam layer inside if you want the pillow to be lower. I've only slept on it one night - but I slept REALLY well with it and felt great this morning.

https://www.amazon.com/gp/product/B081F5CPK4/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1