Hi, as kids are more sensitive to ghosts etc and as you remember having seen some weird stuff then it is not unlikely that you have been truly frighten as a small child and that this has stayed with you. Have you in your meditation tried to regress to a particular moment in your life, from childhood? Or perhaps it can come from your past life? About the bad entity being attached to you I have heard that certain entities is drawn to the energy of fear and so if you are feeling much fear they will be drawn to you, this does not mean they have control over you. When you start to feel better you are of less appetite to them and they will prey on someone else, that is how I have understood how it can work after having read some of it although I am not in a position to claim this is how it really is by own experience or anything. Keep up the good work :)