I mentioned this another thread recently, but this is the pillow I use to help with my cervicogenic headaches and highly recommend it-it's eliminated them. I found this pillow great because it provides the neck support that I found I was lacking in other pillows and while it's soft, it doesn't sink in like a memory foam pillow does, taking away from the support that my neck needs. I too am a slide sleeper and while it took a few nights of getting used to, I find it just as comfortable, if not more comfortable than any of my other previous pillows, especially because I'm not waking up with pain/waking up and having to refluff my pillows.
If you decide to buy it, I'd recommend letting it air out for a few days as it can have a somewhat strong smell (this fades quickly though) and giving it a fair shake- it can be hard to get used to. I stopped using it after a days after because I didn't like it for whatever reason, headaches came back, went back to the pillow, headaches went away and I loved the pillow the second go around.

I’ve been using this pillowhttps://www.amazon.com/dp/B08CXGDZXD/ref=cm_sw_r_cp_api_i_YGBSSJDNBW3RGB96S2KM?_encoding=UTF8&psc=1) and it’s made a world of difference. I recommend letting it sit out for a day or two as it has a somewhat strong smell at first. It can also take a bit of getting used to, I used it for a few days, gave up and decided I didn’t like it. My cervicogenic headaches came back pretty quickly and I gave the pillow another chance, loved it the second time around.