Become your own advocate. Tell the dentist you suspect an infection and you want to do a test. Then begin to have the dentist inject ozone into your mouth . Divided your mouth into four sections. lower right quadrant , upper right quadrant, lower left and upper left quadrant. Get injections in one section and see how you feel, this is very telling. If you indeed have an infection and you feel better for few days after the shot then you might be on to something. If not then go to the next section of your mouth, ozone moves and wants to react with something so it does move through area in the body. I do not know how full proof this, but in a field where they have almost nothing to offer in cases such as mine it is worth a shot.