She just wants to thank her mom. Seriously.

When she was just hours old, she was left on the floor of a Burger King bathroom in PA.  She was adopted, became an EMT, and married. She's had three children of her own.

Katheryn Deprill was disturbed by her doctor's constant questioning of her family's medical history. So she decided to take to Facebook to find her mom.  And her picture and message have blown up.

She actually wants to thank her mom for giving her up and choosing life. Here's her FB page.

So far no word from the mysterious mother.  Katheryn insists no legal action will be taken against her.