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Hello. if you can attach the following photo's I will mark them up with trouble shooting and corrections instructions:
Use the paper clip icon on the right end of the tool bar, or the attach files link to the left of your send button:
Picture of wiring at the nest
Picture of thermostat wire connections to the printed circuit board.
Close up picture, exceedingly well focused of the furnace wiring diagram glued inside of the blower service panel.
We can go from there
Where is the clear well focused photo of the thermostat with its cover removed so that I can see all of the connections there.
Your note showing 1-6 terminal connections does not show any that would run the unit outside, and no C, Y or G connections, yet those colored wires are indeed shown in the terminal strip photo.
That big blue glowing eye photo fails to compute in my brain also or why you included it.