Is it just me??

So today I had my first obgyn appointment and to start off, I’m already nervous. But they have to do tests and stuff. So the nurse tells me she’s gonna take “a little blood for tests” well she meant two tubes of blood. I’m a 97 pound, 19year old. So I told her “that’s gonna be too much blood and I WILL black out” she just laughs and starts the blood drawing mumbling about how it’s not that much. As soon as it’s all done she goes “that wasn’t so bad” and instantly I was seeing spots, dry heaving and then blacked out. The nurse just acts like my behaviour was overrated. Am I crazy for being pissed about this??