You've successfully gotten your feet wet with spice..so i'd say the best thing you could possibly do would be to not worry about it, set up good mental and physical space, and just dive right in. Chances are you will be overwhelmed with joy that you did so afterward. Also, a low dose before the plunge can serve to melt that pre-flight anxiety somewhat.
Many people here including myself have come face to face with all sorts of monsters from our past while tripping. The consensus seems to be that the best way to handle it is to dive in, heart open, but guns blazing, ready to tackle and deal with any demons in your closet that make an appearance. We can't ignore our past if we want to grow. We need to learn from it and face it in order to grow. It also works wonders to just keep a sense of humor about you, and try and not take any of it TOO seriously
<Ringworm>hehehe, it's all fun and games till someone loses an "I"