No, I've seen entities very vividly in my third eye....I believe it's a real phenomenon....I've seen bright flashes of bluish light illuminate a dark room, I've seen black spirits and felt extreme negative energy....but getting into this stuff will make you crazy if you don't know how to manage it...
Read about Kundalini and Siddhis, Hinduism....
You're not crazy, what you're talking about is the basis of several thousands of year old religions!
A lot of people never have a "third eye" awakening in their lives because they don't do anything to raise kundalini...Psychedelics can raise kundalini, but it can be dangerous and overwhelming if you don't have the clarity and understanding to deal with it!
Have you read the Bhagavad Gita or any other of the Hindu texts? Bhagavad Gita is a great place to start....
Also, read about "Siddhis", they're supernatural powers that come about as a result of certain practices, meditiation, chanting, fasting...etc..
Some of them include: Clairvoyance, the ability to perceive spirits/entities, the ability to heal oneself, precognitive dreams...
This stuff IS real, people who have never bothered trying it label it as crazy, but again, these things are an integral part of many of the worlds religions...