I've removed myself from the immediate area to gain control of myself. Being single, I had no help to direct or deal with me so decided to walked into a store and bought a coke. This allowed me time to breath and to process before dealing with the aftermath, the policeman. It helped me.
In America, redecorating the room is rearranging the furniture, new curtains, new pictures, and maybe repainting. When I helped a friend in the UK, redecorating was re-papering the walls which we consider remodeling and is more traumatic. Either way it is stressful, even for NTs.
Next time, maybe arrange to be away until it's finished. You would still have to deal with the changed room and relinquishing some decision processing.