Help! What happened to me last night after drinking?!

Last night, I was out with friends and had two mixed drinks over a two hour time period in a busy bar. After the first drink, I was a little buzzed. I had a few sips of the second drink before I was slammed with the "spinning" feeling and asked the bartender for a water.My friends sat with me and I drank lots and lots of water and never vomited, but my symptoms don't seem consistent with what I've heard about "date rape" drugs.
-I was extremely anxious and hyper vigilant, dysphoric
-I had pinpoint pupils from what I was told that didn't seem to react to changes in light
-I did not pass out.
-I was shaking/shivering and extremely cold. My jaw was chattering in almost an "automatic" way.
-I was crying a lot (which is embarrassing because I'm not a big crier).
-I felt like I couldn't communicate how I was feeling and felt like I was bouncing all over the place when speaking.
BUT, as quickly as this had come on at the bar hours earlier, I started to feel better about half an hour after I got to my friend's house (about 2.5 hours from when this all started, but it was very blurry and I remember it going by faster). Within an hour, I was completely back to normal, and apparently my pupils had improved significantly as well. I became very tired and slept for ten hours (a lot more than I usually do). I do have an uneasy stomach today as well and I'm very tired.

I do not have a history of anxiety or panic attacks or any other mental illness. I also don't use recreational drugs so I wouldn't even know where to start with identification.I did not take any medications before going out.