| If the oven was on the whole time you don’t need to worry about gas because it was being burnt off. You need to worry when the gas is flowing but there’s no fire lit on the stove/oven. |
I think you mean CO. |
This. Like having the burner on with no flame. That's much more dangerous. The heat is your only issue. |
The heat and potentially your upcoming utility bill. But other than that you’re good, OP. |
Over a week! |
It burned down a small amount. |