If you are a Christian, you should be absolutely horrified by the reality of God's coming judgement, since most major denominations of Christianity do not allow for salvation for any other. There are 40,000 denominations (slightly less). It's highly unlikely yours is the right one.
There are a few exceptions. The Holy See recognizes the Orthodoxies, but not Protestants.
And Universalists offer salvation to everyone, even if they're not Christian.
(If God was judging us, They might have given us clear instructions.)