As soon as I enter any house I can automatically know if there is a spirit present or not. I get an electrical charge in my body and my senses heighten. I can sometimes see the spirit's past life, but only a glimpse or two. It's cool and I find it enlightening. But I'm also worried that if I start connecting with them too much I could draw out negative spirits as well. I do not want any demonic being haunting my every move.
I also have dreams that tend to come true, or happen later on in life. Such as meeting a new person, or even seeing a scene play out that I will miss or something important will be said. No one in my family is physic, my mom sees a spirit now and again but it's usually a family member. My dad has been tormented by a spirit when he was younger but that was the last of that. I've talked to the other side, but not on purpose. I was in the 2nd grade when that happened. I've ignored it, suppressed it even. But it's coming back stronger than ever, and I don't know what to do. Am I a medium? What am I exactly? Am I anything at all? I am very concerned about this. And I wish to seek further information about my 'abilities'. What is a girl to do?
You mentioned being concerned about attracting negative spirits and not wanting to be demonically haunted, and that your father had been tormented by a spirit.
What you attract will largely be affected by what you embody. Fear will attract negativity, so get that out of the picture. Shutting yourself down will ultimately not help your spiritual growth. The fact that your father used to be tormented but is no longer may speak as to a family history of successful battle as much as anything else.
(By the way, it is not true that no one else in your family is psychic. As Tiffany indicated, a certain amount of spiritual awareness is part of the human condition, although some may never develop it at all. The fact that your father both experienced and apparently talked years later about his experiences, and that your mother occasionally sees spirits, means two things. One is that you come from a psychic family. The other is that you have parents who accept the supernatural. You are, indeed, fortunate.)
It is likely to the point of certainty that you will encounter negative spirits. Try getting from the grocery store entrance to the checkout stand without encountering at least one nasty person. Some of these may even try to bother you. Frankly, in all likelihood, if you stand up for anything good in this existence, a certain number of hissy fits from the bullies will go with the territory. Here is what you must NOT be confused about:
Encountering a negative spirit does not mean being overwhelmed by it. Ultimately, the light in your own life, the positive energies and helpers that you surround yourself with, and the infinite Spirit are greater than any hostile power. Don't get cocky, follow your gut, and keep your supports strong. But walk in light, not in fear. There's plenty in the dance to celebrate, and your heart should be light.
What is a girl to do? Get your personal and spiritual foundation strong. Pray for guidance in developing and using your gifts. Don't spend any more time worrying about if there is negativity around and if you will encounter it. There is, and you will, and so what. You've known for some time that there are nasty people in the physical world, along with all of the ones who are really wonderful. If you can make peace with one reality, the other shouldn't be a problem.
Take heart, laugh, love, sing, and eat your vegetables.