Allergy to hypoallergenic pillow? - eviltoast

I bought a pair of hypoallergenic pillows a couple of weeks ago and immediately started having a reaction to them. I washed them and no change.

I looked at what they’re made from and I think it might be the Lyocell Tencel in the cover - made from eucalyptus trees.

Everything else about them is the same - afaik - as my other pillows.

Anyone else experience this or know anything about it?