Hi,
I just wanted to say that the body does not rid itself of mercury as it floats in the bloodstream until settles in the organs and has to be forced out through some form of chelation.
As for breastmilk, the mercury is probably being fed to your baby and will thus settle in baby's organs.
I'm no expert either but I know that if you are tasting metal, you and your baby are being poisoned. At the very least, I would switch baby to formula.
There's no way that the mercury will be flushed from your body in 3-4 months. If that were the case, none of us would be going through detox. We'd all be playing the waiting game.
Hope this helps.