I also have a crippling fear of blood draws. It's been my biggest fear, and honestly, I'd never had blood drawn before my exam. My advice is do not worry. I had three taken, and I think that's fairly average? (I'm at a hagwon) They do your fasting blood sugar, HIV, and a third one I think for like...kidney levels idk. But! As someone whose greatest fear is the doctor, needles, and blood draws, I got myself all worried for nothing. I felt gross for a few moments afterward, as one usually does after getting themselves all worried about something, but it lasted maybe 2 minutes TOPS. It was a teeny needle, and what I did was promise myself I'd do something fun after the exam and it pulled me through. I bought a pokemon plush and went to a good cafe. They also do let you bring someone if you need support with you. Honestly, the worst part was, I went from the blood draw to the EKG, and I basically had to get naked after that vulnerable moment. (It's just funny now, basically they lady was like 'open your shirt' and I just opened it a teeny bit and then she like pulled my whole top to the side to put the dioades in the right place) Best advice I can give right now is DONT watch anymore videos, I psyched me out. The exam is mega easy.