What pillow would be best for me? Allergies and bad neck…?

I had had the "perfect" sleep situation (for the last 10 years)… I had a wonderful buckwheat hull u-shaped pillow coupled with a thin head pillow… I had no problems, really… Except that I couldn’t seem to sleep on any other pillow, my neck hurt way too much. Now, my two buckwheat hull u- shaped pillows were pretty dirty and bad off (seeing as how I’d had them for 10 years!)… and, not having too high hopes for their recovery, I put water on them and then they got mildewed and I threw them away… I had gotten them from Cracker Barrel, they had a cotton flannel cover…

Since then, I have purchased two buckwheat hull pillows (wastage of money, because I started sneezing from the smell of the buckwheat hulls in the pillows) (I know it makes little sense seeing as how I was fine with it before)… I’ve had a memory foam pillow and this worked great for my neck but the smell would like to have killed me and my eyes were flaring (I have an inflammatory condition in my eyes)… I also am allergic to most anything other than cotton…

Anyone happen to have any ideas as to another pillow which can support my neck and not be made of most anything other than cotton or if there is a buckwheat hull pillow that might work (not cause sneezing)… (I’m a neck, back, and side sleeper)…
Thank you!