Was I drugged? Rohypnol or Ketamine?

I went on a date with this guy, and we got sushi for dinner. I had two small tumblers of vodka and coke, along with my dinner and some water. I certainly was not drunk when we finished. We went to a bar afterward, where I had a third vodka and coke. When I tasted it it seemed very strong. About 15 minutes later, I blacked out. This is extremely unusual for me, especially since I went from having a mild buzz one second to completely blacking out the next. I don't remember anything for the next three hours, but I was told I was belligerent, throwing tantrums and falling on my face multiple times. I never get moody when I'm drunk. I was extremely confused and disoriented, and I fell asleep on the train home, then went right back to sleep when I got in the door. Does this sound like the effects of roofies or ketamine?