I have a similar thought, though it's more concerned with failure. As an atheist, I don't believe in an afterlife, so I wouldn't be punished if I succeed. Failure, on the other hand, terrifies me. The true punishment is never being viewed as the same person ever again. For starters, I would be locked away in a hospital for god knows how long and forced to take ten different pills that will make me feel dead inside. And, if that's not enough, I will be under constant suicide watch by my loved ones. Even doing something as simple as getting a knife to chop vegetables will be met with suspicion, regardless of the method I actually used. My once quirky and edgy suicide jokes will be a reason to be concerned. And said loved ones, while they claim to care about me, will distance themselves from me subconsciously as they're hurt by what I've done. If I think I'm lonely now, a failed attempt would solidify that. And all of this assumes I wouldn't have irreversible physical damage on top of all that.