I have the same thing. Here is what I do;
Quit using toothpaste! It contains glycerine which makes a film on teeth and keeps them from being able to reenamalize.
Take a high amount of Vit C. I mix 1 ts Vit C powder (from Trader Joes) with 1/2 ts baking soda mixed in 8 oz
Use CS each time I brush to keep infections away.
Take minerals to provide teeth building blocks.