Ok, so we were playing "The house Always Wins" the other night.

I was seeing that the game was comming to an end and took a resign action as my final action before the house came crumbeling down.

All the other investigators were alive when the last doom was placed on the next turn.

Do I then take the damage for the house falling in my head? As I already left the house

Yep! All Investigators who started the scenario take the same resolution, trauma and earned weaknesses and Assets and all.

Just imagine you were waiting in the alley for your friends and a wall fell on you.