Sandy,
I have a Chihuahua (Anna) that has to sleep on my pillow too. Fortunately she does not lick my head very often. However, when I first got her 7 years ago she did. I would move her down to my legs and let her know it was ok for her to lick me, but not on my face.

We went round and round night after night, but she finally realized what I was trying to tell her. If it's too hot for her to get under the covers, I just keep my legs on top of them for awhile, till she gets through licking. She will lick my arms sometimes too.

We cuddle and I pet her and tell her how much I love her, and after about 20 or 30 minutes, she's ready to go to sleep. She curls up on one side of my pillow and I get on the other side. Sometimes she gets over on my husband's pillow and as long as she stays out of his way he lets her stay.

Good luck. I hope it all works out without too much sleep lost.

Teresa