Why do I have panic attacks and such bad paranoia?

I'm only 14, and since I was in fifth grade, I've had this insane paranoia. I worry about getting stuck in elevators, railroad tracks, and have all these stupid fears. For about a year, I never slept over at anybody's house due to my fear of abandonment. I've recovered from that fear, but it was pretty bad. I wouldn't even go to camp, and hated school. Currently, I'm terrified of elevators, I sit there with a look of a scared shaking chihuahua on my face while in one, and would rather take the stairs. Staying home alone doesn't bother me, and I really have no other extreme fears. I've been getting panic attacks since about 4th grade, when I complained about not being able to breathe, and then my dad had to calm me down, but nothing was happening. I get them maybe once every two months, but i got two last month - but that was because my close grandmother ped away. So, what's wrong with me? Should I go take medication?