I have a similar fear of IV’s. I think it comes from diagnosis when they infused a bunch of potassium and it hurt (although I have no conscious memory of this - this was my mothers idea). Sometimes I do OK, but sometimes I get a very irrational panic response to IV’s. I have sometimes tried to fight my medics or run away when I see the IV coming. I repeatedly pull out IVs in the hospital. I just cannot tolerate them. I panic.
I tried to get over it by doing IV training in a paramedic course (twice). I was able to give and get some IV’s the 2nd time I trained, although I was still VERY scared. When they put me in a higher stress situation regarding IVs, where I hadn’t had enough sleep and they were timing me, I totally freaked and couldn’t do it (which was very embarrassing and I know that people really looked down on me afterwards). So, it kinda worked, but not as much as I hoped.
I used to get pretty unnerved when other people gave me shots, but that has dissipated over time (20 years of being diabetic). It doesn’t bother me anymore. I would let anyone give me a shot, no problem.