You do sound to be in a major detox. The metallic tastes you have previously reported sound to me like metal toxicity. There are two ways to go. 1) just push through and increase the Iodine gradually and carry on with the co-supps. 2) Take a couple of days of and slowly build up the dosage again over time, managing your detox.
At the end of the day, follow your instinct. The human body knows what it needs and will tell you.
As for your GF.... Bite the bullet, make the call, explain and help her to know your thoughts. Above all else be truthful of where you are and what you're doing. Honesty is the basis of any meaningful relationship. If she is genuine then she will understand, I'm sure.
Peace ;)