In 1975, Dr. Raymond Moody wrote a book called "Life after Life," in which he speaks of people clinically dying and moving on to some other realm. His conclusion is that there is an afterlife, whether we call it heaven or not. There are many YouTube videos of people who have experienced this phenomenon.
Regardless of religion, race, or sexual orientation, there are hundreds of thousands of people who have had this experience. There is too much evidence of it for me to be sure one way or the other. There is no evidence that one has to be Christian to experience this.
We will all find out for sure some day.