You and I must have had the same piano teacher lol!!! I too a few weeks back chipped a heavily filled tooth and fortunately it was able to be repaired so I did not need a crown. I had noticed this tooth ache some since I started oil pulling, and unfortunately likely weakned the filling material and hence the crack. I do believe oil pulling improved my gums and natural teeth, but realized it is a practice I have to limit to a few times a week so I do not all my unnatural teeth. Listen to your body, maybe it is telling you to rest and restore for awhile then resume the practice when you feel the need for it.