Your family probably didn't know how to control it
I will try to explain it to you.
My paternal grandfather was not the first to have a sixth sense aka the third eye. Even his parents and great-grandparents were born with it. But my grandfather made a big mistake: he made a "contract" with a "good" demon. In our culture, we believe that there are two types of demons, vicious and good. My father went into the seductions of this demon because he was poor and saw no other way out.
After that "contract" he became the most popular and respected medicine man of his village. He married and got seven children, my dad is his last child.
It did not take long for the "good" demon to get what my grandfather had promised him.There are many types of "contracts" between humans and demons, and my grandfather had the worst contract. It's called a "generational contract" and it not just affect the one who signed the contract, it affect the whole family and generation. The demon made my grandfather wealthy, but in return demanded his soul and the souls of all persons of his bloodline who also have the third eye. First my grandfather died, then his wife, then his kids. My father and his sister remained. They were the only ones who could not open their third eye (at least not THEN). Years later, my aunt died inexplicably. That must have been the time when her third eye showed for the first time.
My dad is the only survivor of his family. After he had his first child, it died a few days later. Some years ago his second son died.
The "third eye thing" can bring a lot of positive and helpful experiences, but you have to be very careful. To see hidden things is not always great.
There'ssome entities or demons that are not always kind-hearted to you. They can turn your life to a nightmare.
Sorry for my bad English.