That's my oppening as white!

Yes sir.
This is called the Philidor Defence, though it is not in the true spirit of the Philidor. Philidor's idea with 2...d6 was to not impede the f-pawn with the g8 knight and prepare a quick ...f5. So if someone plays ...Nf6 first, and then ...d6 it is just circumstance that this is referred to as Philidor's defense.

This type of position is the main reason I stopped opening with the King's pawn.
Why wat's the matter????

