I've heard about the notion that our guilty conscience is what holds us in hell, maybe here on earth but I don't believe after we transition to the next plane. No scientific evidence but according to the Bible.
And yes, I've been a naughty boy! There's one thing for sure, and there's no rewind. What we do is done... The ink is dry! So, how do we make it better? By more good deads than bad... Can we climb out of all of the things that we've done to other people by doing good for others? I am sure that most religions say yes. But I think that only our creator can erase our sin by his sacrifice for us.
Reincarnation is another thing that the Bible will not support. However, I will say that some of the evidence from dreams of people who can describe someone else's life is pretty "out there".
Speaking of dreams, is there anyone else out there that can realise that they are dreaming and make changes to the reality in the dream? Sometimes I, for whatever reason, realise that I'm dreaming and I can fly or go into the future or past. I've fell to the bottom of a fall and lived. I've been shot in the head and got back up, crazy things! Also, sometimes, like I've been running for a long distance in a dream and my legs might be sore, as if I'd been running in reality. Idk.