[Pateut]

This is going to probably sound quite strange but I am getting quite concerned. I am not quite sure where to start.
I have had soft blankets for her ever since I got her. When we sit at night I put a soft blanket on my lap and she knows it is snuggle time. When we go somewhere there is usually one with us.
Celine was spayed on the 23rd of this month,( she turned a year on the 8th) at that time they also checked teeth and said they look good.
Recently and we kind of noticed it a couple of times before spaying but thought it was kind of funny, cute. What she did was nibble on the blanket really fast. Only with her front teeth. Like a chatter. It didn't happen often, and at first I thought it was the material but when she is doing it she is so obsessed.
After surgery we noticed it more often, we took the blanket away and she would start the nibble on the bed spread. It isn't hard enough to really even break the material. Tonight it was awful, I would say loud Celine stop it and it was like she was so into it she did not hear me. We tried everything to have her stop. I came out to my computer to see if anyone is up this late. She is sleeping on my lap now, not nibbling. It seems like she is a little more teary eyed than usual too.
I know that I have read on here that some dogs lick their paws with allergies, could this possibly be an allergy? I am really puzzled. In my mind the blanket has always been a comfort for her so could this be pain she is having? I just don't know. Does anyone have any insight on this?