Accidental Creation, Question about creating what I belive to be are 'thought forms' Options

Since I was about 12 I would create characters as I like to call them. At first they were on paper and only there ... then they seemed to widdle their way into ... well, me. They talk and they seem to take on certain purposes within myself, almost like a strange possession or like I'm using their attributes. I know this sounds like I'm crazy, but they seem to have developed a mind of their own .... I know longer know if they even originated from me because they're so different from my initial intentions..... They even have their own .. voices now. There are now more than five of them. It's not like they're harmful, but I want to know what they are and what exactly I did to make them or where they came from if they aren't from me.

I would like to mostly agree with Bym here, there's a radical difference between an imaginary friend and having five different voices floating around unaccounted for. One thing is this, a single imaginary friend that has been around since early childhood might not be so imaginary, it could be the voice of the Ancestor, it could be a divine helper, any number of things, but this voice would have been around as noted, since 'forever'.
Instead we are talking about five different 'characters' that a person has created through stories or thought-form. One legitimate way of looking at this violet would be that you created energy pockets, or spaces of energy within yourself for these fictional beings, but due to poor protection, bad MAGICAL parenting (pretty common in America) or just pure recklessness etc... less than scrupulous energies or entities came to inhabit those pockets of energy and are now basically feeding off of you. It might sound scary and it should, as suggested seek out a mental health professional if needed, but be wise in your discretion of taking prescription medication, sometimes this can help, sometimes this can hinder, ultimately it must be your decision. That of course isn't the only answer, but it's a good start and fairly safe. In truth get mental help without the idea of medication is something that should be practically mandatory, just like a physical visit to a doctor's office every once and awhile. If there's anything else you would like to know please ask.