yes, but you did not chelate, right? if you did not, you can still have a great deal of mercury in your brain, lymphatic system and organs. there really is no need for testing unless you want to know the levels now. but, you really should chelate for 4 months. mercury has a shelf life of 20 to 30 years in the brain. but, don't chelate until you make sure the cavitation doesn't need redone