You will not regret coming here. CZ is a very special place.
It has been determined that the oil will not impact the mercury in your mouth. But what is even more significant is the illness you felt after a teeth cleaning.
OP will clean your teeth very well. It has been proven that teeth cleaning (as well as a variety of dental procedures) will cause bacteria to be released into your system. I consider teeth cleaning hazardous for your health.
There are some recommended messages and posts about freedom from dentistry on this and in the Dental Support forum.