UPDATE: I have been able to beat the game on normal (Nightmare) and I think I was soft locked because of a bug when I tried the first time. My theory is based on the fact It is possible to open one of the heartbreak doors without a key. My theory is once that happens, I think it messes up the ability to get the 3rd disk from room with mother in it. I am going to test this on my Awake save to confirm. It is also possible the Awake mode itself is the cause, but I am not sure about that.