This dream i had awhile ago so not too many details.

So i walk through this really beat up old dingy house up to the attic and find three little girls. Two are sleeping together in one bed and another is sleeping alone in her own bed. I kill these little girls. I dont know how cause the dream never shows me how. Its almost like i dont kill them they just dissapear but i know that i killed them because in this dream i feel this guilt that makes me think thats what happens. I repeat this part of the dream several times over and over before moving to the next part. In the next part its completely flipped. Instead of me going inside and killing the girls im in this old truck outside waiting for the moment these girls die so i can save them. This part doesnt repeat at all. Help?