I'm honestly not sure what happens since I've never been to the other side. I do believe in an intelligent creator of sorts, but I wouldn't call it a religion at all, since it's just a little belief that I have and I see no reason to pray to it or to even think it cares about any of us. I was raised as a Protestant Christian, so I used to believe lots of crazy stuff, with one of those being that people who ctb would get sent to Hell, but I'm not so sure if that idea is Biblical or not. More than anything, it sounds like another scare tactic to control the believers, so it's probably not worth taking seriously.
I think the most likely thing to happen when we die is that we will stop existing when the brain shuts down. I don't know of any study or test that can detect a soul and of course there is the fact that suffering from brain damage can drastically change someone's personality, depending on where it is damaged, and memories can be erased from it as well. If there was a soul hanging around inside of us, shouldn't it have all of that information stored safely, so that the brain being damaged would have no effect on those things? If that was the case, then maybe that soul would go somewhere when the body dies, but if there isn't one, then we would disappear when our brains died, kind of like data on a hard drive getting erased if the drive gets destroyed.
If it does turn out that something bad happens to me after I die, the fact that I ctb probably won't be the reason - if there is a god that wants to send me to some eternal Auschwitz, telling him, her, or them to fuck themselves will be the reason for it. I don't have a lot of hope for there being anything good after this anyway, but that could be my pessimism talking.