I am going to give you gut feelings here, mostly as a result of past failures aka learning opportunities :)
Stop Vit-C and Iodine at least 2 hrs before the procedure. You want any numbing to work well. Have B2 on hand for afterwards and right after the treatment you can start the B2 in what one would consider very large amounts. 4x300mg per day, start back on your Iodine and co-supplements then ALA..
I am a firm believer that Iodine keeps any Hg suspended in blood as long as it can.