Yes, the first time I smoked weed by myself, I smoked the same amount as I had been smoking with 3 other people not realizing what I was doing.
I truly forgot who I was before it slowly came back to me, one fact at a time. Afterwards I ate ice cream and watched TV :D That was almost a decade ago.
Have you ever quit a drug due to one bad experience or something akin to "the last straw?"