Shoulder Tap, Voices And Past Life Feelings

My name is Shannon. I've always researched the paranormal, however I'm not as 'psychic' as many people claim to be. In fact it always seems to be the opposite of what I think it is. Well as you can tell from the title my experiences/story varies. I don't know if they're related, but I believe they aren't.

Other then that I had a few questions, to start, I must confess I do have spirit guides with whom I talk to nearly daily. They don't really have anything to say about these particular experiences.

I attend a public high school, like many of my peers. I was at lunch with my friends and 5 of us were sitting on a bench at lunch, my particular spot is on the edge facing east, where as the bench is directed north. Just to give you an idea of the situation, I tripped like 3 times that day, and while I was at lunch I had one earphone in from my Zune, like usual nothing new about that, I felt someone tap my shoulder 3 times. I turned around to my two closest in range friends, one was holding a painting with two hands so I slapped the other one and asked why he poked me and he claimed it he didn't, which was accurate according to like 5 of my friends, whom looked at me like I was nuts. Including my friends that sit on the ground facing me.

Not far after that I began hearing things at night before I go to sleep. It has dissipated lately. Usually it's like banging or sounds like candy wrapper. However, it woke me up one morning calling my name, it was rather startling.

Also, to include other aspects of my experiences, since I was little, I didn't feel like I was from earth. As bizarre as that sounds, I remember being little and asking myself why I came to earth. It's a strange concept and feeling for myself to absorb. I wanted your all intake on the situation, or if anyone had any helpful hints on past lives and such. Or if anyone else has had similar events occur to them. Any help or info is appreciated.