Preheat oven to 350 degrees. Line an 8X8 inch baking dish with parchment paper or aluminum with a 2-inch overhang on both sides.
In a large mixing bowl, add flour, baking soda, oats, brown sugar, salt, vanilla, and melted butter to the bowl. Stir until combined. The dough will be crumbly.
Divide dough in half, pressing one half of the dough into prepared 8" x 8" pan.
Bake for 10 minutes in the preheated oven, set aside to cool for 10 minutes.
While crust is baking, melt caramel squares and heavy cream in the microwave for 2 minutes on 50% power. Stir caramels and cream until smooth and completely melted. Return to microwave at 30-second intervals at 50% power until completely melted and caramel is smooth when stirred. Set aside to let cool and thicken.
Sprinkle chocolate chips and pecans over slightly cooled crust.
Spread cooled, melted caramel sauce over chocolate chips and pecans.
Break the remaining dough into small pieces then lay the pieces in a single layer over the caramel, chocolate chips, and pecans.
Bake in the preheated oven for 15-18 minutes, or until golden brown on the top. Let Caramelitas cool before cutting.