Is my pillow just beyond the point of hope?

My whole bedroom has started to smell…. Like a hoagie. Like just unwashed body. Not BO, but you get the picture. I was my sheets weekly and was surprised that this happened at all. I do sweat a lot at night because of a medication I’m on and I eat a ton of onion flavored stuff… which I’m going to cut back on.

But anyway I got a special laundry soap with enzymes and threw all of my bedding and mattress/pillow protectors in th wash with it and even did a soak.

The mattress protector and sheets smell great now. But the pillow protector and even pillow case both have that same smell.

I admit that I didn’t know the pillow came with a pillow protector so this is the first time I’ve washed that in years… pillows about 3-4 years old.

I really don’t have a lot of money right now… is there anything that can be done here?

Also I find it strange that the pillow case itself still retains the smell. Is there a point of no return for cotton blend fabric with smells?