I haven't driven my civic for about a week. Now I need to use it, but I've somehow misplaced the keys. The car is sitting outside the house, so one would think it's somewhere in the house, however I do remember taking the car keys out of the house to take something out of the civic and then driving another car out. I'm not sure whether it was at that time that it has been misplaced.

There was no spare key when I bought the car privately.

What do I do if the keys are really lost? I urgently need advice as I need to go out.

Thanks