Hungover after drinking very little and confused

Forgive me I don’t know where else to ask this. I am not a heavy drinker on average, it doesn’t take much to get me tipsy/sick. But tonight was another beast. I think I had three drinks total over the course of 4 hours. A Monaco vodka canned cocktail, some kind of slushee thing from the bar, and a singular high noon. I left the bar round 12:40 and by 1:00 I was throwing up walking down the street. I throw up a lot so I didn’t think much of it. But then I kept throwing up, and throwing up. And I’ve long thrown up the contents of my stomach and I’m just regurgitating spit and water at this point and it’s nearly 7. Alls that to say is, I have never felt this way after drinking seemingly pretty little. I tried looking it up but everything said I was either allergic or roofied. But I remember my entire night. Does anyone know what this could be?