Truth is not based on any individuals "mystical experience". Jesus does not speak of purgatory...rather that in Him we are complete and completely forgiven. Salvation is or not received this side of death.
And St Paul testifies so. But he also testifies of the purifying fire in I Cor 3:13-15. If you choose not to buy what St Paul says, though, that's your business.
And second chances are not given on the other side. Life is the time of choosing.
Note: purgatory or the final salvation is ONLY for the saved. the Salvation comes from Christ’s blood. It is not a second chance to do good and get to heaven because if you are experiencing purgatory you’re already in the saved list, not the damned list.