That sounds like a scary experience, but I think sometimes that seeing these things opens you up to looking at it, and possibly deconstructing the belief and using critical thinking, rewrite what you want it to be instead. Talk yourself out of it basically. Maybe look at what you may not want to give up in holding onto those beliefs...some kind of pay off for keeping them? I like to think those things we think we've lost are still there for us to reclaim at some point, but I don't know for sure in all cases,so...If you'are aware of it though, then you can change it. Letting go can be the hardest thing to do sometimes. I never had this much trouble when I was in my early twenties, letting go of stuff...but it hadn't accumulated too much at that stage.