You've probably already done this, but one of the things that helped me undo the belief that my experiences were related to something supernatural was to study the biological root of those experiences. I'm a bit too embarrassed to go into specifics about some of the experiences I had, but I now know that the times I thought god was talking to me had a very simple explanation. Trust, me I know what you're going through. My de-conversion process was extremely painful at times. But it has been worth every moment of anguish.
That will never hold up in court...
