My tipp: Check yout thyroid, fT3, fT4, Ultrasonic: size of lobes, tissue structure. If andthing is strange: rT3 and antibodies. Also: Take small doeses of iodine, ever one big dose at once. This is not physiological. If you mean 6,25 mg of iodine with "one drop", then this is crazy in my regard and regarding everything I've read, if it is not influenced by Brownstein, Flechas and Abrahams (the 3 guys that work for or own Optimox).
Best,
hans