Four "serious attempts" for me. Two of which had me at Death's door and I can re-account with clarity how it felt.
The first one that had me at Death's door was slowly suffocating myself with a plastic bag on my head. I must have laid there for over an hour just slowly letting Carbon monoxide replace the oxygen, being aware of my labored shallow breath over "time". it takes about 15 minutes of the body to lose all oxygen and "die" even unconscious, so I figured elongating the process slowly would deprive my organs of the oxygen and allow Death to be easier to achieve.
I was right.
Something within me "clicked" I went from lying calmly to thrashing/choking, I had the "flashing before my eyes", like all your thoughts/perceptions are being scrambled like eggs with a fork, you get blinks of things overlaying, your eyes are "open" but you can't see. I felt and heard my heart beating in my chest, I remember screaming in my head for it to stop, to have the pain stop, I felt like I couldn't take it anymore.
Then, bliss.
I felt like I was floating, still, and everything was calm, but I was floating "downward", it was very peaceful, no thoughts, no feeling, just "being". I didn't see anything but darkness, but I "felt" surrounded. IDK if that is the "afterlife" or not, but I felt like I was coming upon something that would be. But then something within me called, whether it was "God/guardian angel/Death" I can't say, but it wasn't my own "voice" saying how "it's not your time yet child."
Then I ripped the bag off my head and gasp'd for air.
My second almost attempt was partical suspension in hanging.
The last thing I remember was just dropping my full weight. I wasn't even aware I was unconscious it happened so fast. However the "human survival instinct" was very strong within me and some how I managed to "stand" and get weight off my neck and breath again, regaining consciousness.
It was terrifying, I felt like a deer panicking fully in raw instinct, I was instantly in tears and scared trying to run away only to be held by the noose and result in more panic. I managed to get it off of me and collapse on the ground trembling and sobbing so hard my chest felt like it would burst into pieces.
Found my will to live after that hanging attempt, I am doing everything I can to try and die naturally, however I know if I have enough reason I could easily have another attempt and probably succeed.
Perhaps because I'm a high empath, and an old soul that has me come here despite being "healthy" I by no means am here to condemn or persay anyone from doing what they feel they have to. I do have experience and advice, and if that can offer and help another suffering soul find peace with as little pain as possible then that is intention I can find peace with.