The 'crumbling' feeling you have may be cognitive dissonance. Your mind cannot accept two radical views as both correct, so it must begin to sort it out. When you accept it as 'truth' the cognitive brain kicks out what you believed before as 'truth'. Now, your cognition is beginning to try and sort it again. This is the first step. Most of us took that step before we realised what it meant.
Many come into false beliefs due to this factor. Many leave due to the same, IMO, but most discussions deal with how it gets us into a religion or cult, not out.
http://en.wikipedia.org/wiki/Cognitive_dissonance
As for the blood issue - see www.ajwrb.org
Welcome. Stick around. It takes a while to sort it out.
Jeff