Hi. I TOTALLY understand. I can't bear it.
The things that helped me were:
Telling them I was nervous and really spelling it out. Like, I am properly anxious about it.
Getting them to tell me at what appts I would need blood drawn so I knew in advance and it wouldn't be a shock.
Taking my Mum with me. She used to drive me, I was extremely sick in pregnancy.
Taking an ice cold bottle of water to sip on.
Ask to lie down if you feel too faint sitting up even if looking away. I used to lie on the couch and count as high as I could and do relaxing breaths.
Playing headphones with relaxing music into your ears as they do it.
Don't let others tell you you are being silly. I have felt your pain just reading then typing this I feel a bit sick too.
I am usually a pretty strong person I have travelled the world on my own, been self sufficient for many years it is just this one thing that I find so hard to deal with. Injections are not so bad though.
Good luck, it will be over quickly. ps treat afterwards 