Almost every reference has it the other way around:
Because, if you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, [then] you will be saved.
We have to be careful that our constructs do not rewrite scriptures. We can and should never do that and most of the time I try to post God's Word instead of my own. His will never return void. I don't have that luxury.
Then, not to be confused with:
For by grace you have been saved through faith. And this is not your own doing; it is the gift of God, not a result of works, so that no one may boast.
Faith is not my own doing, but it doesn't mean 'saved' before being saved.
My answer then:
God must act on your behalf (and He did) before you are brought to salvation. It is more precise and clearer than 'Saved before saved.'