There's something called pyrokinesis, which is the fire version of telekinesis. I don't think you can create a flame with your mind but you may be able to manipulate already lot flames with your mind. If you have a long line of psychics (lucky you, considering psychics really just use a greater percentage of their brains than those who aren't psychic, so, technically--and I don't mean to sound like Charles Xavier here--they're more evolved. I agree that you should talk to your family.
Actually the idea that people only use a certain percentage of the their brains is a common misconception. It's simply untrue, but I don't blame you for believing it as it appears to make sense at first glance. However it is still a myth that has long be debunked by neurologists, though I honestly have no idea if a psychic's mind is any different from a mundane person. I also have seen nothing in my experience to indicate psychic ability is hereditary, though I imagine psychics would be more likely to encourage similar traits in their children. I personally think everyone has the potential for psi and there isn't any measurable difference between a psychic and a mundane, though some people may have an innate talent for psi just like music or mathematics.