sweet, congratulations! I'm the same way..I get so queasy even if someone is telling a story about blood/needles/etc. Surprisingly, I was ok getting my forearm tattoo - I have no idea what is gonna happen with getting T shots/top surgery - "no pain, no gain" --right? 😛 kidding.
Last year, this girl in my drawing class was getting a tattoo and she told the artist doing her tattoo that she eventually wanted to give tattoos... so then, he made her actually do a portion of her own tattoo! crazy ->-bleeped-<-, I would not be able to do that.
Try not to psych yourself out about it and think of something gruesome so that in comparison, doing the shot yourself will be no biggie.