As was already mentioned, more than likely your reaction to the blood draw has more to do with your anxiety rather than the actual procedure.
For those of you who have a fear of having your blood drawn, and as someone who has drawn blood from too many to remember, here is my take:
There are those who come in, sit down, have their blood drawn, end of story.
Then there are those who come in and are somewhat nervous, fidgety. For them I would make small talk to take their mind off of the procedure.
Then there are the ones who sit down and mention that they may faint. I have no problem with that. I always have them lie down.
Then there are the ones who sit down and immediately start telling me what I MUST do to make them feel better. I MUST lie them down. I MUST talk to them about anything other than needles. I MUST let them stay there for a long time (which I would never ask anyone to leave if they did not feel well) and I MUST stay with them for this period of time. I even had one gal demand that I hold her hand when it was all over.
Mind you, all of the things mentioned are fine for someone to do who really does need it. But I am talking about the ones who say all of the above very loudly, like it is some sort of show to get attention.
Then there are the ones who come in and are very very quiet. They are the ones I give extra special care to. They are the fainters! They are the ones that have a fear so great of having their blood drawn that they cannot even speak.