Why didn't I get a hangover after drinking for the first time?

I'm 5 feet tall and 98 pounds, so I didn't expect to be able to drink very much for the first time I got drunk. I had 2 shots of vodka, 2 shots of rum, half a mixed drink, and a mikes hard lemonade. This was over the course of 3-4 hours. For at least 2 hours before I went to bed I was dizzy and laughing at everything. I even didn't mind a guy I didn't know putting his arm around me which would normally make me nervous. I think I was drunk, if this is what drunk is? haha I woke up a little dizzy at first, but I've felt fine all day. Is it possible that I wasn't as drunk as I thought I was? Not that I'm complaining, but why didn't I get a hangover?
Why didn't I get a hangover after drinking for the first time?
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