Lost Coordinates In Creative
Solution 1:
You should be able to access your logs through your minecraft files:
C:\Users\GiraRay\AppData\Roaming\ .minecraft\logs (remove the space in Roaming\ .minecraft !)
Here, you can see a list of winRAR files and txt. documents named after dates of every play session. Each file should contain everything displayed in the chat and every command executed, by cmd blocks and players.
Unless you remember when you built that house, it's going to be a pain to navigate the right file.