Never had a brain freeze or hangover?

So last night I drank a good amount of whisky and vodka within the time span of 45-60 mins. It was my first time legitly drinking and i was at home by myself. I decided to go to bed after a few more sips of vodka. I woke up idk how much later and ran to get bread but realized that I just had to let it out, i threw up like 2-4 times then cleaned up and went to bed telling myself that im never drinking again. I woke up 6 hours later with no headache or hangover. This was my first time getting "wasted" so i expected a hangover. I have also never had a brain freeze in my life. So why didn't I have a hangover? Why did I puke? Here is exactly what I had. I started with jamison and gingerale, probably one cup total of jameson, then took swigs of vodka. This was right after eating 4 eggs. Did I puke because I mixed whisky and vodka? Because I found out that makes you sick. Or was it because I drank way too fast? Or both? Im about 6'7 and 138 pounds. Thanks!