Yes, I had some sore teeth pretty soon after quitting cigarettes; I think it was bottom front teeth. Went away in several days, if I recall.
I'll try not to get into a long discourse, but I've come to realize our bodies tend to react to abrupt changes in our habits, whether it is eating, drinking, smoking, sleeping, exercise, etc. If we do mostly the same things over and over again, we get used to it. Changing a long-standing habit overnight is somewhat of a shock to the system, for whatever reason. It takes a while for the body to adapt.
Any concerns, I would recommend seeing a doctor.
Congratulations on your 15 days and 20 hours! A thousand mile journey begins with the first step. Good luck and keep stepping!