I have my doubts, and as you say, none of us knows for sure. Like Amethyst mentioned, perhaps if you have a near death experience you would have a clearer picture of what's in store. There were no religious nuts in my family, but I was raise Catholic and went to Catholic school for the first 8 years, so I was in church 7 days a week.
Even though I had religion shoved down my throat during that entire time in school, I have never even read the bible in its entirety like Rkunsaw, only the required reading in school, usually from the New Testament, and then they told us what everything meant and what we should believe. To me it seems to be just a book written by men, and opened up to interpretation by the reader. Religious people who want to make their points to another, often cherry pick parts of the bible that suit their needs. The people who are 'over the top', and have to preach and try to recruit everyone they come in contact with on a daily basis with their conversation, I resent and avoid. I've put them in their place when necessary.
I have walked away from Catholicism when I entered public high school, and have not been involved in any church activities since. IMO, churches are just businesses, being religious in no way make someone a good person, and the behavior of priests and nuns over the years has darkened my opinions even more.
I do believe in some type of Supreme Being and Creator, and noticed that when some people become elderly and sick on their death beds, they can begin to pray and show signs of belief. Nothing wrong with that, who knows, I may be doing the same in my last hours.