Just drunk or drugged?

[Nomaam]

I went out last night, and I got a large sonic drink and put some svedka in it. I drank about half of that at a birthday party, and I was doing fine. I was a little drunk, but I was able to control myself, and I wasn't doing anything out of the ordinary. I then went to a bar and got a vodka Red Bull, which I have had before and had no adverse reaction to it. Then, things got weird. I could barely control myself. I was all over the place. My friends tried to take me home, and I jumped out of the moving car and threw up on someone's lawn. I was being very aggressive, which is strange for me because I've never been an aggressive drunk before. If anything, I'm one of those drunk cryers who tells you how much I love you. I was yelling at my friends and telling them that I would sue them, and I vomited several times after that. I then started crying and hyperventilating, and I was having trouble breathing. I threw up some more, and my friends had to carry me up the stairs to my apartment and then into my bedroom. I woke up this morning with no recollection of anything that happened, and I feel so bad for my friends. I have never acted like that before, but I don't remember anyone having the time to spike my drink. I might have put it down, but I honestly can't remember. I just don't know how I would have acted that way if I have had much more to drink and eaten way less than that on other occasions. I'm pretty shaky right now, and my roommate said I threw up a lot last night. Does this sound like a strange drunken incident, or was I drugged?