I use one pillow which is purposely made to help breathing if you have a seizure while sleeping.
It's called breathe-zy anti suffocation epilepsy pillow
https://breathe-zy.com
It's amazing!

Eh i have been allone allot never really had a problem with being suffocated by one.. Have came to with them soaked.. Allong with wll my sheets.. Smh .. Probably have and angel there to keep me safe

Pillows are really made too keep your head aliined in the postion it is with the spine it has a curve at the neck so a pillow keeps it in that postion but people move at night so pillows are more comfort than needed now

I sleep with two pillows. one is very soft and the other one is a little firmer. I have always slept with two pillows even before I have the seizures. I just cannot sleep flat. One day I hope I can buy the Sleep Number bed so I can sleep on my back in a almost sit up position.

I have a bamboo pillow i love it. Its firm but not to firm.