How do you get rid of your fears?

ok get rid or contain your fear...let me elaborate. i have hyperchondria and needle phobia. any little thing i feel like my eye may be hurting i freak out and think that i'm going to go blind, i cant go to the doctors cause i'm petrified of needles...now last year i was mentally a mess with all my fears, BUT for the rest of last semester until now i've been ok, i've been keeping it in check. my question is how can i still keep it in check cause i think i might go back to being petrified ok, like it might get the best of me again. i need to keep control over it so it doesnt control me anymore....i need advice, please give me HONEST and SINCERE ones. thank you.