Oddly, I experienced sensitive teeth when I first started oil pulling. I did notice it when it happened but continued on pulling and it did go away. It didnt last too long or I would have gotten concerned also. I too, do not have an health issues, nor do I have any teeth problems, but started this with my husband because he has KP and I found out that op helps with that.
The question of mineral depletion has been on my mind a lot lately also. One, because I have my own distiller for water and have been concerned about leaching from that, and two the question of the OP possibly pulling out minerals. Matter of fact just yesterday after speaking to a health conslor, whom I respect, I did decide to purchase and begin adding minerals to every gallon of distilled water that I make.
However, I do still have concerns, and I do believe, that oil pulling could be pulling out important minerals.