Scared to death

I know this is very childish but I have an awful fear of needles. Just the thought of them makes my anxiety skyrocket and I immediately grab for the inside if my arm (traumatic experience with needles there as a kid so I either cover them with my hands or dig my nails into them whenever my anxiety about needles acts up, idk why) my yearly ie coming up soon though and I need to get some boosters. What am I going to do? I cant go screaming and crying like a five year old, it's time I got over this bs and even though I know this it's still very hard for me. In fact just writing this is hard because I can feel my fingers wanting to dig into the inside of my arm. So what do I do? How do I get over this?