The sinus problem is part of bromide detox. I'm concerned that you're so overwhelmed with bromide in your bloodstream that it could get reabsorbed back into your tissues.
This is where the 48 hour break (or pulse dosing) is helpful. You just stop all Iodine for 48 hours then begin again. This will rest your overtaxed kidneys and flush the overpowering bromide out. Keep up with the salt loading three times a day during the 48 hours. And of course take a lot of vitamin C.