If you don't know why he calls you Sarah, then there might be more info for you. It seems like a bad thing for me to tell you that, if I understood your question correctly that is. I also think that you can continue to search for files even after you've "finished" the game. I can't promise anything though, it was a while since I played it. There are no real easy answers to this game, you will have to make up your own mind about certain things. I will strongly claim that there are in fact only one woman in this game. I don't think you will prove anything, regarding the midwife, but I can't remember everything that was said in the interviews. Do we even know that that actually happened? Hmm, I think I have to play it again, got curious myself now, haha.