Is this anxiety, or what is it?

i always think about the worst possible thing that can happen whenever i do something. airplanes: its gonna crash. elevators; chords gonna break. carnivalrides; its gonna break down. whenever theres a plane over new york city i get so nervous. when people are walking past my house i hide so that they dont look in and laugh at me. (i always feel like people are looking at me) i had a panic attack once. i put a ring on that was too small and i couldnt get it off and my finger was red and i started like hyperventalating and crying. everyone is always says geez calm down or stop paniking. my parents say i always have panick in my voice. soowhat do i have because i really want to know?i think its anxiety.