Different combinations of things can react differently at different times within the body also. I know that one OD I did (in the hospital) & ended up in ICU on a ventilator. Same combination of pills later on did NOTHING.

Sometimes the body seems to be in a more vulnerable place than others.

I am so sorry this happened & left you struggling with it. I know I struggle with the choices that my mother made at the end of her life even though she did have cancer. It's hard when they make poor choices even when they aren't intentional....& we end up living with the consequences of their poor choices.....it's a struggle to deal with no matter how much we LOVE them we are the ones who end up HURT.