Thank you for your answers.
Then, is there a chance it was not a tulpa?
Can you, while trying to create a tulpa, accidentally summon some entity that will then pretend to be your tulpa?
I found this story of a tulpa that become so powerful it enslaved the host:
https://s16.postimg.org/h8apnsr9v/00072643033.png
Is this real?
Can such thing happen?
Can tulpa be dangerous?