That was a very well written recount of the events. You seem to be creative based on the words you use and flow of writing, but I could be wrong. Either way, I enjoyed reading it (obviously not your suffering, but just the quality of the writing).
The chemicals the brain releases or holds onto create a wide range of feelings and reactions. Your attempt seemed similar to mine, in that I'm not sure if I would've jumped either, but I too had a similar feeling of "this is it, it will all be over". It's a blissful feeling when you think you've finally suffered as much as you have to, so you can make sure there's no more.
I'm sorry you've experienced so much pain, as you probably already know, you're not alone in that.
It wasn't your time to go, and that's completely okay

. It isn't something that needs to be debated about whether your attempt was "real" or not. The urge and pain were/are real, but nothing needs to be done about it. Sometimes as terrible as negative emotions feel, the alternative of feeling nothing is worse.
I hope you're in a better state more recently

.