Why am i so scared of blood test?

okay i'm not scared of the pain i really don't care about the pain. Is just the needle, like i'm not scared of shots because it goes in my arm but i'm scared of blood test because it goes in the vein and i'm sensitive around the radius where they take the blood test. But why am i so sensitive there? i think i been paranoid or something ? haha when i was a kid every time i went to children hospital i did blood test and i was just afraid of the pain but i didn't really care much because i knew it was going to be over. But like now i just have negative thoughts like what if the needle breaks? or my vein rips ? haha i know crazy and another thing is when i was little my sister use to scared the crap out of me talking about needles . but why am i so scared now when i got older? i don't even like people touching there , i don't even touch it myself . Why is it that i got older even though i been experience with it many times but now i'm very afraid? do you guys have any sensitive around too? and how do i get rid of feeling like this and not being so sensitive? what do you think? Last time i did a blood test was probably 3 years ago i'm scared next time i do it i would faint or something?