Hello, I am trying to identify a very small wormy/larvae that I found on my pillow. It is white and about 2-3 mm long. I picked it up with tweezers and placed it in a jar. About a week later I took it out to try to get a better look. It is now brown and still alive.it looks like it has little ridges down it's back. What might this be? Can they bite or the adult stage bite? How can I get rid of them? Will placing the pillow in the dryer kill any other existing ones?