Hello, I Don’t Know If I Had A Seizure Or

Hello, I don’t know if I had a seizure or what it was but I am a drinker and pot smoker , I have been for years. I used to be on drugs but I stoped and I just drink and smoke now, however last night I hadn’t smoked in about a month , and I smoked dabs and drank which I drink everyday but like I was fine then I was walking all of a sudden I collapsed and fell and started twitching and my eyes rolled in the back of my head , I woke up 30 sec later and had no idea what happened ? Do you know what might have caused this?