I am almost hoping that it is celiac related! I REALLY do want to quit, but when I did (5 years ago) I had not heard of Celiac, so didn't know about gluten free. The canker sores began 7 months after quitting and I suffered through them for about 8 months before starting smoking again!
Smoking tobacco does, for some, suppress celiac symptoms.
My mother is in Canada right now and has been hunting down a home test kit, but hasn't found one yet. (she is skeptical, but willing to do the home test). She has Ulcerative Colitis, hypothyroidism, arthritis (hip replacement surgery this coming February), chronic canker sores, breaks bones easily (currently in a boot for a broken toe). Basically, if she tests positive I am going to quit and will retest for Celiac. We might also then pursue the testing with my son. Also my older children would then be tested.
So I guess it all rides on Mom's diagnosis! LOL. If she can't find a test kit while in Canada, I will just buy her one off the Internet!